The following tables present IEM computed monthly data summaries based on
daily data provided by or computed for the IEM. A download interface
exists for the daily summary information. The climatology is provided by the
nearest NCEI climate station (USW00014895) within the current 1991-2020
dataset.
To load shown data into Microsoft Excel,
highlight the table information with your mouse and then copy/paste into Excel.
Precipitation Totals [inch]
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1948
M
M
M
M
M
M
0.00
3.20
4.49
2.32
0.00
3.80
1949
4.29
2.41
2.57
2.78
2.45
3.56
6.61
2.09
1.81
1.05
1.06
2.38
1950
8.67
4.02
2.93
4.38
2.58
6.29
3.00
1.91
2.80
1.19
4.44
2.52
1951
3.03
2.81
5.20
3.89
3.07
5.35
3.69
2.21
3.08
1.89
4.24
4.89
1952
5.55
2.46
3.47
3.25
2.43
2.28
3.65
1.81
3.94
1.19
2.07
1.87
1953
3.68
1.06
2.59
2.78
5.27
5.51
1.71
2.68
0.94
0.45
1.13
1.87
1954
2.87
1.92
4.31
4.82
1.52
2.98
1.62
4.31
1.98
8.42
1.08
1.74
1955
1.80
1.98
4.71
3.32
2.71
2.37
2.47
2.43
1.82
3.53
3.90
0.31
1956
1.44
5.24
4.23
3.51
9.60
3.68
5.12
5.95
2.78
1.31
1.07
3.12
1957
1.88
1.27
1.60
5.23
3.10
4.86
2.60
0.77
3.33
1.54
2.03
3.92
1958
2.21
1.05
1.04
4.20
3.24
3.57
11.43
3.07
3.82
0.66
2.32
0.79
1959
5.46
4.08
2.45
3.43
4.51
1.95
4.91
3.79
3.97
4.80
3.18
2.71
1960
2.63
2.32
1.63
1.79
3.15
4.86
4.15
2.60
0.20
1.01
1.47
1.24
1961
0.73
2.94
3.26
5.09
2.57
2.47
6.39
2.14
2.17
1.90
3.10
1.59
1962
2.57
2.15
2.36
1.80
1.87
1.38
3.81
1.95
3.82
2.72
2.11
2.44
1963
1.06
1.08
4.71
2.82
2.08
2.45
1.95
2.25
1.55
0.47
1.87
1.48
1964
2.19
1.81
8.83
6.06
3.29
1.17
3.54
5.65
0.59
1.26
1.90
4.54
1965
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1966
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1967
0.00
0.77
0.99
1.03
1.81
0.36
0.80
1.12
1.34
0.81
1.04
0.92
1968
1.11
0.22
0.89
0.62
2.02
0.96
1.28
1.20
0.44
0.63
1.41
1.65
1969
0.93
0.22
0.67
3.88
3.78
2.94
6.08
1.68
1.51
2.15
2.85
2.73
1970
1.48
1.84
2.46
0.98
1.42
1.96
1.85
0.22
1.11
1.33
1.09
0.83
1971
0.43
1.35
0.99
0.25
0.75
1.89
1.08
0.87
1.05
0.38
0.69
1.61
1972
0.49
0.86
1.37
1.33
1.20
0.76
2.26
1.29
2.07
0.97
1.48
1.41
1973
1.67
2.33
4.36
3.45
3.97
3.61
3.88
2.01
2.09
4.58
2.43
2.38
1974
2.93
1.85
5.68
2.49
4.86
2.74
2.42
8.19
1.81
1.51
3.39
4.25
1975
3.79
3.58
3.45
1.74
3.45
2.77
2.22
7.47
5.27
2.57
1.67
2.88
1976
3.16
2.99
3.49
1.64
1.15
3.78
2.48
1.89
3.78
2.15
0.51
1.37
1977
1.06
1.08
3.54
3.47
0.91
4.12
3.34
3.36
2.90
1.91
4.16
4.11
1978
2.67
0.31
1.96
1.74
3.07
1.22
1.61
4.12
1.98
2.54
1.06
3.81
1979
2.88
2.00
1.56
3.53
4.19
2.41
1.48
3.79
7.54
1.45
3.03
2.40
1980
1.54
1.27
4.52
2.96
5.18
3.71
4.94
4.70
1.51
1.84
1.83
2.13
1981
0.81
4.55
1.94
6.00
3.46
5.73
4.13
1.47
3.20
1.66
1.92
3.35
1982
4.71
1.78
3.81
1.18
3.13
4.23
2.13
1.47
2.98
0.81
4.94
3.43
1983
1.58
1.38
3.74
5.08
4.57
2.03
3.38
3.06
2.73
3.22
4.16
3.43
1984
1.15
3.01
2.99
2.82
5.44
1.64
3.02
3.77
2.52
2.75
3.41
2.58
1985
1.33
1.80
4.64
1.14
6.14
2.72
2.56
3.47
0.67
1.60
9.39
2.80
1986
1.38
3.17
2.07
1.83
2.11
3.05
3.70
1.23
3.51
3.23
3.41
2.81
1987
2.05
0.31
2.87
4.02
2.61
3.83
2.85
3.96
2.11
1.99
1.38
2.33
1988
1.13
2.71
2.11
2.82
1.88
0.37
5.05
3.89
4.92
2.63
3.88
1.83
1989
2.23
2.11
3.86
2.46
5.98
8.42
2.83
1.13
3.38
2.45
2.49
1.98
1990
2.18
5.01
1.27
5.12
7.28
3.60
10.03
6.26
9.02
7.10
2.11
6.72
1991
2.44
1.96
2.66
3.04
1.49
0.81
0.67
1.70
2.50
1.49
1.99
3.33
1992
1.94
1.97
3.87
3.72
3.02
1.59
10.94
4.96
3.71
2.07
5.10
2.24
1993
4.04
1.92
3.99
3.96
1.36
5.46
1.86
1.65
3.96
4.38
5.87
2.76
1994
3.53
1.61
3.38
5.80
3.53
3.11
3.07
7.54
1.74
1.07
3.15
2.98
1995
4.87
1.36
1.67
3.24
6.38
3.70
2.12
2.67
1.11
4.63
1.72
0.89
1996
1.73
1.30
2.34
4.77
4.65
4.27
2.74
2.21
5.52
3.73
2.69
3.78
1997
1.53
1.47
2.79
2.42
6.45
3.92
1.16
3.77
2.29
1.02
2.33
1.94
1998
3.67
2.46
2.49
5.77
2.66
5.63
2.12
5.76
0.62
3.98
2.15
1.92
1999
3.50
2.63
2.09
3.13
3.10
1.19
5.66
2.76
2.79
1.83
3.28
1.97
2000
2.37
2.33
1.93
5.10
6.52
4.91
6.86
4.01
4.22
2.53
1.72
3.08
2001
1.44
1.61
1.76
3.55
4.26
2.93
1.18
4.15
2.55
4.48
2.85
2.34
2002
1.98
2.12
3.88
5.92
5.35
3.09
2.01
2.70
4.48
1.88
4.35
2.85
2003
2.52
1.90
2.77
2.28
8.16
2.41
12.55
3.19
7.48
2.56
3.12
2.94
2004
3.07
1.22
3.68
3.39
6.52
6.62
3.12
6.15
5.57
1.81
3.14
2.40
2005
5.61
2.15
2.11
4.35
2.38
0.84
6.09
6.90
3.00
3.89
2.41
1.29
2006
3.15
2.29
2.22
2.85
5.53
5.30
6.29
2.97
3.35
4.73
2.54
2.47
2007
4.34
1.28
3.62
2.61
2.08
3.01
3.07
6.06
2.44
3.59
3.41
4.34
2008
2.03
5.73
5.80
1.59
2.84
7.76
2.57
1.12
3.81
2.08
3.23
3.42
2009
2.73
1.94
2.70
2.76
3.59
4.31
3.26
4.58
2.03
3.61
1.13
2.94
2010
1.70
2.64
2.99
2.07
3.82
6.06
4.07
2.98
3.95
1.78
4.80
1.99
2011
1.63
4.44
4.44
4.94
7.25
5.38
6.80
4.49
4.38
4.91
4.88
4.75
2012
3.39
2.42
2.93
1.62
1.94
1.71
3.96
5.42
4.27
5.29
0.75
4.05
2013
2.16
2.00
2.06
4.49
1.52
5.91
7.11
1.79
2.90
5.59
3.19
3.39
2014
1.95
1.58
2.58
5.03
3.97
8.70
4.17
5.72
1.20
3.81
2.57
2.31
2015
3.49
1.99
2.76
3.84
4.68
8.31
3.86
0.76
3.75
2.68
1.76
3.70
2016
1.19
3.38
4.58
3.50
2.00
3.51
2.06
3.36
6.54
3.76
1.76
2.94
2017
6.13
2.34
5.39
4.62
7.50
3.95
3.07
0.75
2.02
3.55
6.34
1.89
2018
2.18
5.35
3.12
5.55
4.17
3.42
1.65
3.63
7.26
4.27
4.37
2.71
2019
2.65
3.78
3.48
3.86
2.81
8.31
7.11
1.49
1.66
3.76
1.64
3.80
2020
3.28
2.64
5.47
3.49
3.65
2.99
1.80
3.94
2.82
4.71
2.82
2.44
2021
1.97
2.06
2.00
2.41
4.39
5.24
7.08
3.76
2.18
4.33
1.99
3.63
2022
2.88
4.71
5.15
3.08
4.47
2.36
3.79
1.65
2.87
2.38
3.26
1.89
2023
4.82
1.88
4.49
4.01
1.68
2.39
4.13
6.80
0.33
2.81
1.53
2.59
2024
3.59
1.01
2.99
5.44
5.02
1.04
3.04
6.55
3.53
0.87
3.54
4.04
2025
1.59
3.21
0.01
M
M
M
M
M
M
M
M
M
NCEI Climatology
2.92
2.54
3.23
3.86
4.13
4.43
4.14
3.61
3.50
3.34
3.08
2.89
Average Wind Speed [MPH]
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1948
M
M
M
M
M
M
6.8
5.6
6.6
6.8
9.5
8.5
1949
10.6
8.8
11.1
8.6
8.4
7.3
6.5
5.4
8.0
7.3
10.5
10.0
1950
11.3
10.4
12.1
10.8
7.4
7.8
7.1
6.2
6.6
7.0
11.5
9.3
1951
11.3
10.4
10.9
9.8
8.3
7.2
7.3
6.7
8.2
8.6
12.5
12.2
1952
12.0
10.7
11.2
10.8
9.3
8.2
7.7
6.5
7.0
9.5
10.6
10.5
1953
11.1
12.5
11.4
11.9
8.3
7.7
6.1
5.8
7.1
6.3
8.9
11.7
1954
11.4
11.2
12.3
10.6
8.7
8.1
8.1
8.4
8.6
9.8
10.6
15.0
1955
12.7
11.8
14.7
12.3
11.3
9.0
8.3
9.1
9.3
11.2
13.6
12.4
1956
12.4
13.0
13.8
13.4
11.4
9.4
9.1
10.3
9.9
10.2
13.2
12.6
1957
12.3
11.8
12.9
12.3
11.2
10.4
8.0
8.0
8.6
8.7
12.7
13.5
1958
12.2
15.6
11.4
12.0
11.7
10.3
8.7
7.8
9.3
11.2
12.8
11.1
1959
13.3
12.8
13.8
12.9
10.2
9.5
7.7
8.4
8.8
9.8
12.3
11.2
1960
12.5
14.1
12.3
12.2
10.9
9.9
7.5
7.7
8.4
9.5
11.8
12.2
1961
11.2
10.7
12.5
12.8
11.1
8.6
8.9
7.8
8.7
11.2
14.5
15.2
1962
15.9
13.1
10.3
10.0
8.2
7.0
7.2
6.8
8.5
8.8
8.5
10.0
1963
9.0
10.0
10.8
10.2
8.9
6.5
6.9
6.9
7.7
7.2
11.0
10.2
1964
12.4
10.0
11.9
11.1
9.3
7.9
6.7
7.4
7.4
8.0
9.2
10.4
1965
11.1
11.9
9.8
10.3
8.8
9.3
8.2
8.8
9.0
10.1
10.9
11.4
1966
11.7
10.0
11.0
10.2
9.1
7.1
7.7
7.5
7.4
9.5
10.8
11.0
1967
11.6
12.0
9.7
11.0
10.5
8.0
7.5
7.9
7.8
9.9
11.2
11.0
1968
10.7
11.8
11.2
10.6
10.1
8.8
7.7
7.7
8.2
9.4
10.8
13.3
1969
12.1
10.9
10.9
10.1
8.7
8.8
7.4
6.5
7.7
9.7
10.4
11.1
1970
10.1
11.3
10.2
10.2
9.2
8.4
7.2
6.7
7.6
8.5
10.9
11.3
1971
11.9
12.9
11.8
10.9
9.2
8.0
7.6
7.1
7.6
7.8
10.1
10.9
1972
11.6
11.0
11.3
10.8
9.5
9.1
7.5
7.6
8.1
9.0
9.5
10.2
1973
11.4
10.2
11.6
11.1
10.2
8.2
8.0
6.8
7.5
8.6
11.9
11.9
1974
10.6
12.0
12.2
11.9
9.9
10.0
7.7
7.6
8.5
8.4
10.5
10.4
1975
11.9
11.1
12.1
11.8
8.7
9.1
7.3
7.6
8.3
9.1
10.1
10.9
1976
11.8
12.9
12.6
9.4
10.2
8.4
7.9
6.8
7.5
10.5
11.5
12.7
1977
12.8
12.4
12.2
10.6
8.1
8.7
8.0
7.8
8.1
9.6
11.0
12.3
1978
12.5
7.9
10.7
11.8
8.7
8.3
7.4
6.8
7.7
8.4
8.5
10.6
1979
11.0
10.2
10.5
10.2
8.0
8.6
7.5
8.1
7.4
10.0
10.6
11.1
1980
9.7
9.5
11.5
9.8
8.1
8.1
7.4
7.5
7.5
9.2
10.5
10.1
1981
9.4
11.4
11.0
11.1
8.9
8.6
7.4
7.6
8.8
10.0
9.5
10.3
1982
13.1
10.1
11.4
12.5
7.7
7.7
7.1
6.9
7.1
8.5
11.1
11.4
1983
10.6
8.5
10.9
11.5
9.5
6.1
7.7
6.9
8.1
10.2
10.5
12.3
1984
10.7
11.2
11.5
9.8
7.9
8.8
7.4
6.7
8.8
7.6
10.7
11.8
1985
13.8
11.2
12.5
10.9
9.8
9.0
8.5
8.1
7.8
9.8
10.9
12.5
1986
11.6
9.9
11.6
9.8
9.2
9.6
8.4
7.9
9.2
8.8
9.5
9.7
1987
11.3
10.5
11.0
10.7
8.2
8.1
7.2
7.9
7.5
9.1
11.8
11.5
1988
11.2
12.3
10.4
10.8
9.0
9.5
7.7
7.6
8.4
10.3
12.0
11.9
1989
11.8
10.5
11.0
9.4
10.0
6.8
6.4
7.5
8.6
8.6
12.2
10.0
1990
12.2
11.0
10.2
10.2
11.0
9.8
8.7
6.7
8.1
10.0
10.3
11.3
1991
10.6
10.9
12.2
10.7
8.5
7.8
8.8
7.8
8.2
9.6
11.1
11.3
1992
11.0
10.7
10.2
9.7
9.1
8.2
8.6
8.0
8.5
8.7
10.2
11.2
1993
11.3
10.7
10.6
10.5
9.2
8.6
7.7
7.1
9.0
9.6
10.6
10.5
1994
11.6
11.2
10.3
11.4
9.9
8.4
7.3
7.5
7.7
8.0
10.7
8.8
1995
10.6
10.6
9.0
8.4
8.3
7.9
8.8
8.2
6.9
9.8
10.9
10.2
1996
11.5
10.9
10.3
11.4
9.2
7.1
7.5
4.9
8.1
8.8
8.6
10.5
1997
13.0
10.8
11.7
9.1
11.3
8.0
6.9
6.6
7.1
8.2
9.2
9.4
1998
9.1
9.0
11.2
8.7
6.9
7.8
6.2
6.3
6.4
7.3
9.7
9.2
1999
11.3
10.0
10.6
10.2
8.1
8.1
7.3
6.7
7.0
8.6
9.4
10.1
2000
10.8
9.9
9.9
8.8
8.7
8.3
6.8
6.8
7.9
7.0
9.8
10.1
2001
9.4
10.9
9.8
9.8
7.8
6.7
6.9
6.8
7.8
10.8
9.0
9.9
2002
10.7
11.5
11.3
9.9
8.8
6.7
6.9
7.3
6.5
7.7
10.5
10.5
2003
9.9
10.4
9.3
10.3
9.3
7.3
7.2
6.1
7.6
8.0
10.3
10.6
2004
11.2
9.9
9.9
10.4
8.7
7.2
7.5
6.9
6.7
7.8
8.5
10.7
2005
9.6
8.8
9.7
10.2
7.8
7.5
6.6
6.5
6.6
7.2
11.9
10.1
2006
10.8
11.3
9.7
9.5
7.9
7.1
7.3
6.5
8.2
9.7
7.5
10.8
2007
11.7
10.9
10.8
12.0
7.9
7.4
7.4
6.2
6.3
8.5
9.6
10.1
2008
12.2
10.4
10.8
9.6
9.0
8.6
7.4
7.4
7.3
9.0
9.1
13.0
2009
9.9
11.0
10.2
11.1
8.2
7.3
6.6
6.7
7.6
8.1
8.3
9.9
2010
10.2
8.3
8.4
8.7
8.6
7.4
6.2
5.8
8.2
8.3
8.7
10.1
2011
9.1
10.9
10.0
11.9
8.3
7.9
6.0
6.4
7.1
7.5
10.8
8.7
2012
11.5
9.2
9.7
9.4
6.9
8.3
7.0
5.7
6.2
10.0
7.0
9.1
2013
10.6
10.3
9.9
10.5
9.8
7.4
6.5
5.9
6.7
7.6
10.5
9.8
2014
11.9
9.1
9.9
9.6
7.3
7.1
7.0
6.5
6.4
9.1
11.3
9.0
2015
10.4
9.9
9.5
10.5
8.3
8.4
6.6
7.0
7.1
9.7
9.9
9.9
2016
11.3
11.5
10.4
10.0
7.7
7.6
6.7
7.0
6.8
8.6
8.7
10.8
2017
10.3
10.8
11.3
10.3
9.3
8.6
7.0
7.1
6.2
8.4
9.9
9.7
2018
10.9
10.0
10.1
9.8
8.1
7.6
7.0
7.6
7.8
9.2
9.5
9.1
2019
11.3
10.6
9.6
9.4
8.4
8.4
6.2
6.8
7.3
8.6
9.1
9.7
2020
9.9
10.1
10.0
9.9
8.9
7.3
6.5
6.5
7.2
7.9
10.1
10.2
2021
8.6
10.0
10.4
9.1
7.1
7.9
6.6
5.8
8.5
7.9
9.4
9.7
2022
10.6
11.5
10.7
10.1
9.1
7.6
7.8
6.7
7.4
9.6
10.2
10.2
2023
9.7
11.0
11.0
9.2
7.7
8.3
6.9
7.0
6.0
8.0
9.4
8.5
2024
10.2
9.5
10.2
10.1
7.6
8.1
6.8
6.5
7.2
6.9
9.5
10.2
2025
10.7
9.8
12.9
M
M
M
M
M
M
M
M
M
NCEI Climatology
M
M
M
M
M
M
M
M
M
M
M
M
Average Daily High Temperature [F]
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1948
M
M
M
M
M
M
81.48
80.29
74.87
57.42
52.90
38.29
1949
41.13
42.18
45.45
56.10
71.16
82.57
84.32
81.61
68.40
67.97
47.00
40.32
1950
44.23
35.54
39.71
50.20
70.23
76.50
79.00
79.00
70.73
64.81
42.00
29.74
1951
34.29
36.25
44.65
55.17
70.42
76.90
81.13
79.87
71.00
65.23
40.90
37.06
1952
38.19
38.10
43.26
58.73
66.26
82.80
84.52
80.45
74.87
56.42
50.00
38.00
1953
39.10
40.00
46.16
52.57
71.00
79.67
82.13
82.55
75.47
66.81
50.57
39.16
1954
35.00
41.93
41.84
64.30
64.65
79.53
83.26
78.97
75.67
61.39
47.37
35.26
1955
31.26
36.21
47.23
64.27
71.32
75.23
86.19
83.32
76.30
61.55
45.07
33.23
1956
31.45
37.59
43.13
54.10
66.84
76.50
78.10
78.19
68.47
66.06
48.67
42.45
1957
28.19
38.96
45.29
58.63
68.97
78.20
80.68
80.65
73.00
57.10
48.50
41.26
1958
32.29
27.50
40.71
60.43
68.77
73.90
80.06
78.74
71.67
61.68
50.63
28.77
1959
31.61
38.11
44.39
58.73
73.16
78.33
82.13
83.32
76.93
61.29
45.83
39.29
1960
36.19
33.41
32.68
62.80
65.94
77.03
79.23
81.03
76.53
62.90
50.60
30.03
1961
28.93
40.75
47.84
50.00
64.71
75.93
80.42
80.68
79.03
65.03
48.77
35.84
1962
31.94
34.46
42.71
57.60
76.23
80.23
80.26
82.45
70.87
62.52
47.33
31.61
1963
27.55
28.46
48.16
58.63
67.35
78.90
81.71
76.48
73.40
71.39
49.17
25.55
1964
36.06
32.48
46.32
60.20
71.77
78.53
82.71
76.45
74.03
61.90
53.60
38.39
1965
31.97
34.82
38.87
56.73
74.13
76.90
80.77
77.94
74.10
57.84
49.40
41.71
1966
27.90
34.14
47.58
53.17
63.58
79.53
82.90
78.74
70.23
59.61
48.53
36.00
1967
38.65
32.43
45.48
60.03
61.16
81.93
79.29
76.84
70.63
61.29
41.67
39.94
1968
30.39
31.66
49.03
61.43
64.52
78.67
81.29
81.00
74.27
62.58
48.80
36.65
1969
34.00
37.54
42.00
61.13
69.87
75.57
80.29
80.42
71.33
62.19
45.20
32.90
1970
27.39
34.89
40.71
59.40
71.81
77.27
79.55
80.61
76.63
63.68
47.87
37.94
1971
30.23
36.79
41.48
56.67
67.48
81.00
80.42
79.13
74.43
67.39
45.67
42.74
1972
33.42
31.21
41.26
54.97
67.90
71.97
78.32
78.06
72.47
56.61
43.73
40.61
1973
37.32
35.36
56.10
57.67
64.90
80.17
82.13
81.71
75.87
65.94
52.17
38.45
1974
38.61
35.36
48.16
61.40
67.84
74.73
82.65
79.71
68.37
60.03
50.47
36.10
1975
37.90
37.75
43.74
53.43
72.90
77.93
83.13
81.74
66.20
62.94
55.50
39.61
1976
30.58
46.28
52.74
60.03
65.48
78.07
77.61
75.74
69.20
54.26
40.50
32.00
1977
19.77
34.39
54.32
63.93
77.00
76.27
83.90
79.19
72.40
57.87
50.20
35.26
1978
25.87
23.68
39.48
56.70
67.13
76.63
78.65
80.42
78.27
59.42
50.23
39.45
1979
26.77
25.11
51.52
55.57
66.29
75.97
77.23
76.97
71.67
57.81
49.93
39.39
1980
32.68
29.79
42.55
56.90
70.32
74.27
81.58
81.77
74.83
57.52
46.30
36.42
1981
27.71
40.07
44.13
61.93
68.26
78.47
80.61
79.13
70.33
60.32
51.80
35.52
1982
28.77
34.75
45.81
55.40
76.32
73.97
82.94
78.00
70.80
63.65
51.53
46.97
1983
35.06
40.54
49.65
54.47
65.71
78.17
85.00
83.52
74.97
61.58
51.03
30.71
1984
28.61
43.62
37.29
56.83
62.77
80.03
79.16
79.00
69.67
64.26
47.27
44.29
1985
25.84
32.29
50.19
64.07
71.29
72.77
79.87
78.13
75.60
63.42
51.50
30.68
1986
32.55
35.04
49.19
62.80
70.42
77.17
82.10
78.77
75.47
61.61
45.60
36.77
1987
32.03
38.68
50.52
58.70
73.00
79.47
83.61
79.58
71.77
55.74
53.03
38.94
1988
32.13
35.10
46.23
57.50
71.39
80.90
87.39
83.35
71.83
53.74
50.20
37.35
1989
42.19
31.68
49.81
55.00
64.58
76.27
81.84
79.58
71.63
61.58
47.10
24.61
1990
41.19
43.00
50.68
59.07
65.23
76.07
79.06
77.84
70.93
62.35
52.97
43.35
1991
34.71
40.21
50.68
62.63
78.84
83.33
86.13
83.77
73.87
64.23
45.93
39.84
1992
35.06
39.38
44.77
57.73
68.23
74.53
78.90
75.68
71.00
58.13
46.23
38.48
1993
37.61
33.07
42.26
57.53
69.90
76.63
83.65
84.77
69.83
59.90
47.67
34.84
1994
25.74
34.43
43.71
61.43
65.23
80.50
81.29
77.68
72.50
62.45
54.90
43.29
1995
34.94
33.11
50.00
56.70
67.61
80.00
82.71
84.77
71.43
62.55
41.77
30.81
1996
31.19
34.24
40.68
57.50
65.58
77.73
78.23
79.55
69.93
60.84
40.20
40.45
1997
33.23
40.25
46.81
54.93
62.13
77.30
80.84
75.77
70.40
61.10
42.80
36.58
1998
39.58
43.71
47.03
59.33
73.06
75.27
79.68
80.55
75.70
60.94
50.83
42.61
1999
34.68
40.57
42.81
61.23
72.06
79.57
85.81
76.74
73.93
60.65
53.47
39.06
2000
32.61
40.95
52.03
57.45
70.42
76.77
76.71
76.87
70.40
63.52
44.43
27.42
2001
32.15
38.83
40.74
63.62
69.22
78.03
82.11
82.18
71.85
62.24
56.91
42.24
2002
40.03
41.64
47.26
60.10
66.13
80.03
86.26
83.71
78.37
57.81
45.17
34.71
2003
25.26
30.32
49.35
62.17
66.74
74.60
80.16
81.16
71.03
59.03
53.03
37.03
2004
27.87
36.66
47.74
57.97
74.29
74.67
79.06
76.52
74.70
61.52
51.03
37.13
2005
33.90
37.46
41.06
61.50
66.39
82.47
84.62
81.81
77.03
61.23
52.17
31.81
2006
44.68
36.61
44.90
64.07
68.26
76.40
82.42
81.10
68.80
57.71
52.23
44.55
2007
37.00
24.89
50.68
55.40
75.84
80.60
80.97
82.71
78.03
67.39
47.83
37.87
2008
36.10
34.52
41.00
63.27
66.06
79.17
82.39
80.32
76.33
60.84
45.80
38.77
2009
26.89
37.81
51.91
60.72
71.27
77.73
77.86
79.87
72.80
57.93
53.53
36.15
2010
31.94
31.45
51.67
66.01
72.73
79.80
85.29
84.00
75.47
63.30
52.34
29.49
2011
28.27
36.17
45.82
60.53
72.02
79.57
87.19
81.50
72.54
61.32
55.43
42.52
2012
39.23
41.62
61.84
60.30
78.35
82.57
88.69
82.58
73.03
60.68
48.03
43.99
2013
38.51
34.85
41.48
61.90
74.00
78.60
81.97
80.29
74.10
63.48
45.67
37.94
2014
29.26
31.21
42.48
62.13
72.14
80.27
80.03
80.55
74.87
62.03
44.97
40.87
2015
31.39
25.64
44.77
61.53
77.23
78.80
82.84
82.39
79.80
63.42
57.47
51.26
2016
35.19
41.07
55.10
59.40
70.13
81.37
85.90
87.03
79.27
66.03
55.67
36.10
2017
40.52
49.25
47.06
67.37
69.06
80.87
83.93
82.00
78.73
67.74
50.47
35.77
2018
33.35
45.46
43.13
55.80
79.26
80.60
85.74
85.55
78.23
62.55
42.43
41.77
2019
34.68
40.68
45.39
62.66
73.61
78.73
86.48
82.48
82.07
68.23
45.87
43.97
2020
41.94
39.72
53.48
57.63
68.81
81.43
89.13
83.81
75.37
62.00
56.43
39.58
2021
35.58
32.75
57.39
62.00
70.06
81.83
82.29
85.55
78.23
69.55
49.70
48.23
2022
31.42
39.64
53.35
58.37
74.52
82.23
85.84
83.74
75.30
64.26
53.83
40.39
2023
41.97
50.32
48.87
63.43
70.52
76.10
82.94
78.84
73.87
61.90
50.10
44.94
2024
34.52
46.55
52.03
63.13
73.87
81.87
84.74
82.71
78.23
66.68
52.73
40.03
2025
27.23
34.57
34.00
M
M
M
M
M
M
M
M
M
NCEI Climatology
35.51
38.73
48.41
61.80
72.29
80.40
84.30
82.71
75.91
63.39
50.71
39.90
Average Daily Low Temperature [F]
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1948
M
M
M
M
M
M
62.58
59.45
54.03
39.35
37.40
25.26
1949
27.35
24.50
28.00
35.50
49.16
61.40
65.81
60.74
48.33
46.81
32.43
24.81
1950
28.00
21.50
23.03
31.90
48.26
55.47
58.77
57.81
52.67
45.55
28.23
16.16
1951
22.00
20.79
27.90
35.43
48.26
57.73
60.77
57.94
50.73
44.10
26.93
21.71
1952
23.90
24.03
27.10
38.97
46.61
59.80
63.13
59.90
51.97
36.19
33.90
27.55
1953
25.52
23.64
29.94
35.57
50.48
58.20
61.84
60.26
52.13
43.06
34.37
24.61
1954
20.39
25.89
25.32
42.20
44.61
58.87
58.97
59.06
54.77
45.48
33.33
23.35
1955
18.39
21.68
27.13
43.67
50.03
54.43
65.45
64.00
54.17
43.23
28.83
19.68
1956
20.10
23.14
25.90
35.40
45.77
57.40
60.97
60.45
49.20
45.61
32.03
30.81
1957
15.55
24.25
28.68
40.80
48.61
59.23
60.58
58.35
52.77
40.45
32.50
25.94
1958
19.16
14.93
28.71
39.37
46.16
53.40
63.90
59.26
54.63
42.45
34.10
13.19
1959
14.52
20.07
25.68
38.80
52.81
57.77
63.03
64.94
57.50
44.35
29.20
28.29
1960
24.48
21.93
16.35
42.83
48.55
57.13
58.97
62.58
57.30
43.45
35.17
15.23
1961
17.40
25.32
31.65
35.50
43.77
55.90
62.32
62.06
59.00
45.94
34.57
22.61
1962
16.55
19.54
27.35
39.17
55.52
59.27
61.16
60.32
52.20
45.68
34.50
17.39
1963
11.35
10.29
31.16
39.30
45.94
57.77
60.39
57.26
49.40
46.55
35.77
15.10
1964
21.84
17.79
28.42
39.47
50.48
57.00
62.32
57.97
52.67
38.55
35.43
25.29
1965
18.71
17.86
25.58
37.70
54.87
56.90
58.84
59.48
57.80
42.45
35.07
30.84
1966
15.90
22.93
29.84
38.53
44.29
59.33
64.13
60.55
52.87
41.13
35.13
26.35
1967
26.29
18.14
30.74
41.27
44.52
61.83
61.90
59.65
51.27
44.74
32.00
29.06
1968
16.23
15.00
32.00
43.43
49.35
61.20
64.19
64.42
57.83
46.32
37.20
25.13
1969
21.45
23.89
25.74
39.17
48.00
56.10
63.45
60.03
53.77
42.45
32.97
20.97
1970
12.16
18.57
26.81
41.63
52.68
59.60
63.97
62.52
58.70
48.42
36.93
26.94
1971
15.10
23.71
26.48
36.57
47.39
62.37
62.23
58.16
58.73
50.03
31.73
29.03
1972
17.77
17.00
24.26
36.00
50.13
53.90
63.32
61.94
57.47
42.16
35.53
29.97
1973
22.03
19.93
38.52
41.70
49.55
61.87
63.84
64.06
56.17
48.45
38.63
27.10
1974
23.26
19.32
30.94
42.97
48.48
57.40
61.32
62.35
51.77
41.87
36.60
27.10
1975
25.90
24.68
28.81
35.10
53.71
61.43
62.87
65.06
51.77
45.03
40.57
27.03
1976
15.29
27.76
33.90
38.93
45.42
59.83
59.97
57.42
50.97
39.48
26.10
15.71
1977
3.87
19.89
35.97
44.50
55.00
57.07
65.87
63.52
57.33
42.42
37.33
21.45
1978
12.81
9.04
25.42
37.67
50.16
58.47
62.26
63.58
58.20
41.06
35.10
25.61
1979
13.55
9.64
33.00
37.90
47.65
57.50
61.23
61.45
54.77
44.06
35.57
27.03
1980
20.94
17.66
27.45
37.83
51.13
54.23
63.32
67.26
57.13
40.77
33.30
23.23
1981
15.48
24.32
28.90
42.33
49.58
61.17
63.39
61.71
55.07
41.55
35.77
26.03
1982
11.61
20.89
29.65
35.40
55.74
55.93
63.90
58.94
54.43
46.58
38.60
33.29
1983
23.19
25.18
33.81
39.73
47.58
59.17
64.87
64.48
56.10
46.77
38.47
19.32
1984
16.61
29.41
23.03
40.27
46.97
60.63
60.16
61.55
51.37
49.45
32.67
29.35
1985
13.65
17.25
31.03
43.10
49.97
53.60
61.65
60.71
55.33
45.29
39.67
17.97
1986
19.84
23.11
30.13
40.97
51.87
57.73
63.42
59.26
56.90
45.61
32.70
26.68
1987
21.58
23.14
29.97
40.33
51.68
60.37
65.19
61.87
55.50
38.19
36.63
28.74
1988
17.45
18.45
28.39
37.87
49.90
55.67
64.97
63.97
53.93
37.94
35.37
22.58
1989
26.42
18.93
29.00
36.27
49.16
59.10
64.06
60.48
54.07
43.55
31.60
11.84
1990
28.61
25.89
33.19
39.73
47.26
57.80
61.65
60.68
54.70
45.03
35.97
27.55
1991
21.16
26.32
34.48
45.60
58.29
62.00
65.06
61.97
53.57
44.77
32.03
26.48
1992
22.94
25.52
27.71
39.03
47.29
54.43
62.90
57.42
53.30
39.74
35.23
27.71
1993
25.42
17.32
28.55
38.77
48.81
58.50
64.65
62.97
52.60
40.35
34.40
24.26
1994
11.42
18.25
28.29
40.23
44.90
59.13
64.00
60.13
53.33
43.84
37.40
29.65
1995
21.97
16.57
29.87
36.87
49.39
61.80
64.26
66.13
50.83
44.90
29.40
19.00
1996
16.81
19.38
22.74
35.93
48.58
60.40
59.94
60.42
55.27
42.94
28.57
27.87
1997
17.00
26.14
28.81
35.53
43.35
58.80
61.45
58.97
52.30
41.52
31.33
26.52
1998
27.84
30.29
31.84
39.67
55.16
58.37
61.26
62.26
56.20
42.84
35.27
28.10
1999
19.26
26.18
25.06
40.77
50.94
59.97
65.45
59.68
53.47
42.42
35.30
25.71
2000
18.06
26.10
33.84
39.27
51.94
59.70
58.55
59.42
52.40
44.77
32.50
13.61
2001
20.76
24.77
26.65
40.89
49.43
58.03
59.87
62.59
51.30
44.18
37.39
29.45
2002
25.71
23.32
28.23
40.73
43.65
59.57
63.19
61.84
56.50
42.19
32.53
23.03
2003
12.97
16.07
28.48
39.60
48.61
56.60
61.77
62.29
52.57
40.61
36.77
25.32
2004
13.10
20.07
31.58
39.63
51.29
55.73
60.81
57.71
54.53
43.06
35.83
22.77
2005
18.77
22.50
24.23
38.80
43.90
61.60
64.34
63.55
55.97
44.68
33.53
20.94
2006
31.06
21.14
28.42
40.50
48.06
55.47
64.23
62.39
52.13
40.19
35.00
30.00
2007
22.65
10.61
30.94
37.50
49.90
57.23
58.52
63.55
55.20
48.94
32.13
25.03
2008
20.97
18.17
25.68
40.63
45.06
59.27
61.61
57.84
54.37
40.29
31.33
22.29
2009
10.18
21.08
28.94
39.63
49.35
56.92
58.32
61.34
54.57
38.10
37.96
22.53
2010
18.59
19.81
31.37
42.20
52.63
61.27
64.28
64.39
54.24
43.02
31.88
18.81
2011
15.96
20.21
27.05
41.26
52.69
58.60
66.31
61.23
56.36
43.85
37.56
29.92
2012
23.94
25.95
40.29
38.05
54.74
58.70
66.23
60.29
52.53
44.39
31.00
31.03
2013
22.30
20.83
27.13
38.67
51.75
59.03
64.82
60.61
53.70
45.26
31.33
25.19
2014
12.19
14.46
21.77
40.67
51.94
60.53
60.48
61.55
54.00
44.77
29.53
29.13
2015
15.87
5.86
24.90
41.43
54.87
61.47
62.16
60.35
58.80
44.26
38.91
36.23
2016
19.13
23.24
35.42
36.03
49.19
59.67
64.68
66.35
58.47
46.97
36.10
24.46
2017
27.00
30.71
30.61
45.20
50.48
59.93
64.36
59.97
56.03
48.71
33.73
21.00
2018
16.94
27.11
25.71
33.80
57.39
61.27
64.87
65.61
61.46
45.48
32.03
29.71
2019
19.13
24.25
26.65
42.83
52.58
59.83
66.84
63.06
59.47
47.16
30.20
28.55
2020
28.87
24.69
35.65
37.03
49.13
60.33
67.48
62.81
55.13
46.35
38.23
28.58
2021
26.03
19.29
32.61
41.57
48.77
63.70
64.10
66.32
57.37
53.94
33.23
32.52
2022
15.81
21.93
32.48
39.87
54.65
60.40
66.06
64.35
57.03
42.94
36.80
27.29
2023
31.71
28.32
30.03
40.47
46.81
54.93
62.87
59.58
54.87
45.48
31.57
33.39
2024
23.74
26.28
33.19
43.70
53.81
61.10
64.10
62.77
57.57
44.87
37.70
27.55
2025
13.90
20.79
16.50
M
M
M
M
M
M
M
M
M
NCEI Climatology
20.30
22.01
29.40
39.80
50.40
59.41
63.40
61.90
54.90
44.00
34.21
26.10
Average Daily Temperature (high+low)/2 [F]
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1948
M
M
M
M
M
M
72.03
69.87
64.45
48.39
45.15
31.77
1949
34.24
33.34
36.73
45.80
60.16
71.98
75.06
71.18
58.37
57.39
39.72
32.56
1950
36.11
28.52
31.37
41.05
59.24
65.98
68.89
68.40
61.70
55.18
35.12
22.95
1951
28.15
28.52
36.27
45.30
59.34
67.32
70.95
68.90
60.87
54.66
33.92
29.39
1952
31.05
31.07
35.18
48.85
56.44
71.30
73.82
70.18
63.42
46.31
41.95
32.77
1953
32.31
31.82
38.05
44.07
60.74
68.93
71.98
71.40
63.80
54.94
42.47
31.89
1954
27.69
33.91
33.58
53.25
54.63
69.20
71.11
69.02
65.22
53.44
40.35
29.31
1955
24.82
28.95
37.18
53.97
60.68
64.83
75.82
73.66
65.23
52.39
36.95
26.45
1956
25.77
30.36
34.52
44.75
56.31
66.95
69.53
69.32
58.83
55.84
40.35
36.63
1957
21.87
31.61
36.98
49.72
58.79
68.72
70.63
69.50
62.88
48.77
40.50
33.60
1958
25.73
21.21
34.71
49.90
57.47
63.65
71.98
69.00
63.15
52.06
42.37
20.98
1959
23.06
29.09
35.03
48.77
62.98
68.05
72.58
74.13
67.22
52.82
37.52
33.79
1960
30.34
27.67
24.52
52.82
57.24
67.08
69.10
71.81
66.92
53.18
42.88
22.63
1961
23.17
33.04
39.74
42.75
54.24
65.92
71.37
71.37
69.02
55.48
41.67
29.23
1962
24.24
27.00
35.03
48.38
65.87
69.75
70.71
71.39
61.53
54.10
40.92
24.50
1963
19.45
19.38
39.66
48.97
56.65
68.33
71.05
66.87
61.40
58.97
42.47
20.32
1964
28.95
25.14
37.37
49.83
61.13
67.77
72.52
67.21
63.35
50.23
44.52
31.84
1965
25.34
26.34
32.23
47.22
64.50
66.90
69.81
68.71
65.95
50.15
42.23
36.27
1966
21.90
28.54
38.71
45.85
53.94
69.43
73.52
69.65
61.55
50.37
41.83
31.18
1967
32.47
25.29
38.11
50.65
52.84
71.88
70.60
68.24
60.95
53.02
36.83
34.50
1968
23.31
23.33
40.52
52.43
56.94
69.93
72.74
72.71
66.05
54.45
43.00
30.89
1969
27.73
30.71
33.87
50.15
58.94
65.83
71.87
70.23
62.55
52.32
39.08
26.94
1970
19.77
26.73
33.76
50.52
62.24
68.43
71.76
71.56
67.67
56.05
42.40
32.44
1971
22.66
30.25
33.98
46.62
57.44
71.68
71.32
68.65
66.58
58.71
38.70
35.89
1972
25.60
24.10
32.76
45.48
59.02
62.93
70.82
70.00
64.97
49.39
39.63
35.29
1973
29.68
27.64
47.31
49.68
57.23
71.02
72.98
72.89
66.02
57.19
45.40
32.77
1974
30.94
27.34
39.55
52.18
58.16
66.07
71.98
71.03
60.07
50.95
43.53
31.60
1975
31.90
31.21
36.27
44.27
63.31
69.68
73.00
73.40
58.98
53.98
48.03
33.32
1976
22.94
37.02
43.32
49.48
55.45
68.95
68.79
66.58
60.08
46.87
33.30
23.85
1977
11.82
27.14
45.15
54.22
66.00
66.67
74.89
71.35
64.87
50.15
43.77
28.35
1978
19.34
16.36
32.45
47.18
58.65
67.55
70.45
72.00
68.23
50.24
42.67
32.53
1979
20.16
17.38
42.26
46.73
56.97
66.73
69.23
69.21
63.22
50.94
42.75
33.21
1980
26.81
23.72
35.00
47.37
60.73
64.25
72.45
74.52
65.98
49.15
39.80
29.82
1981
21.60
32.20
36.52
52.13
58.92
69.82
72.00
70.42
62.70
50.94
43.78
30.77
1982
20.19
27.82
37.73
45.40
66.03
64.95
73.42
68.47
62.62
55.11
45.07
40.13
1983
29.13
32.86
41.73
47.10
56.65
68.67
74.94
74.00
65.53
54.18
44.75
25.02
1984
22.61
36.52
30.16
48.55
54.87
70.33
69.66
70.27
60.52
56.85
39.97
36.82
1985
19.74
24.77
40.61
53.58
60.63
63.18
70.76
69.42
65.47
54.35
45.58
24.32
1986
26.19
29.07
39.66
51.88
61.15
67.45
72.76
69.02
66.18
53.61
39.15
31.73
1987
26.81
30.91
40.24
49.52
62.34
69.92
74.40
70.73
63.63
46.97
44.83
33.84
1988
24.79
26.78
37.31
47.68
60.65
68.28
76.18
73.66
62.88
45.84
42.78
29.97
1989
34.31
25.30
39.40
45.63
56.87
67.68
72.95
70.03
62.85
52.56
39.35
18.23
1990
34.90
34.45
41.94
49.40
56.24
66.93
70.35
69.26
62.82
53.69
44.47
35.45
1991
27.94
33.27
42.58
54.12
68.56
72.67
75.60
72.87
63.72
54.50
38.98
33.16
1992
29.00
32.45
36.24
48.38
57.76
64.48
70.90
66.55
62.15
48.94
40.73
33.10
1993
31.52
25.20
35.40
48.15
59.35
67.57
74.15
73.87
61.22
50.13
41.03
29.55
1994
18.58
26.34
36.00
50.83
55.06
69.82
72.65
68.90
62.92
53.15
46.15
36.47
1995
28.45
24.84
39.94
46.78
58.50
70.90
73.48
75.45
61.13
53.73
35.58
24.90
1996
24.00
26.81
31.71
46.72
57.08
69.07
69.08
69.98
62.60
51.89
34.38
34.16
1997
25.11
33.20
37.81
45.23
52.74
68.05
71.15
67.37
61.35
51.31
37.07
31.55
1998
33.71
37.00
39.44
49.50
64.11
66.82
70.47
71.40
65.95
51.89
43.05
35.35
1999
26.97
33.38
33.94
51.00
61.50
69.77
75.63
68.21
63.70
51.53
44.38
32.39
2000
25.34
33.53
42.94
48.36
61.18
68.23
67.63
68.15
61.40
54.15
38.47
20.52
2001
26.45
31.80
33.70
52.26
59.33
68.03
70.99
72.39
61.57
53.21
47.15
35.84
2002
32.87
32.48
37.74
50.42
54.89
69.80
74.73
72.77
67.43
50.00
38.85
28.87
2003
19.11
23.20
38.92
50.88
57.68
65.60
70.97
71.73
61.80
49.82
44.90
31.18
2004
20.48
28.36
39.66
48.80
62.79
65.20
69.94
67.11
64.62
52.29
43.43
29.95
2005
26.34
29.98
32.65
50.15
55.15
72.03
74.48
72.68
66.50
52.95
42.85
26.37
2006
37.87
28.88
36.66
52.28
58.16
65.93
73.32
71.74
60.47
48.95
43.62
37.27
2007
29.82
17.75
40.81
46.45
62.87
68.92
69.74
73.13
66.62
58.16
39.98
31.45
2008
28.53
26.34
33.34
51.95
55.56
69.22
72.00
69.08
65.35
50.56
38.57
30.53
2009
18.54
29.45
40.42
50.17
60.31
67.33
68.09
70.60
63.68
48.02
45.75
29.34
2010
25.27
25.63
41.52
54.10
62.68
70.53
74.79
74.20
64.86
53.16
42.11
24.15
2011
22.11
28.19
36.43
50.89
62.36
69.08
76.75
71.36
64.45
52.58
46.49
36.22
2012
31.58
33.79
51.06
49.17
66.55
70.63
77.46
71.44
62.78
52.53
39.52
37.51
2013
30.41
27.84
34.31
50.28
62.87
68.82
73.40
70.45
63.90
54.37
38.50
31.57
2014
20.73
22.84
32.13
51.40
62.04
70.40
70.26
71.05
64.43
53.40
37.25
35.00
2015
23.63
15.75
34.84
51.48
66.05
70.13
72.50
71.37
69.30
53.84
48.19
43.74
2016
27.16
32.16
45.26
47.72
59.66
70.52
75.29
76.69
68.87
56.50
45.88
30.28
2017
33.76
39.98
38.84
56.28
59.77
70.40
74.14
70.98
67.38
58.23
42.10
28.39
2018
25.15
36.29
34.42
44.80
68.32
70.93
75.31
75.58
69.85
54.02
37.23
35.74
2019
26.90
32.46
36.02
52.75
63.10
69.28
76.66
72.77
70.77
57.69
38.03
36.26
2020
35.40
32.21
44.56
47.33
58.97
70.88
78.31
73.31
65.25
54.18
47.33
34.08
2021
30.81
26.02
45.00
51.78
59.42
72.77
73.19
75.94
67.80
61.74
41.47
40.37
2022
23.61
30.79
42.92
49.12
64.58
71.32
75.95
74.05
66.17
53.60
45.32
33.84
2023
36.84
39.32
39.45
51.95
58.66
65.52
72.90
69.21
64.37
53.69
40.83
39.16
2024
29.13
36.41
42.61
53.42
63.84
71.48
74.42
72.74
67.90
55.77
45.22
33.79
2025
20.56
27.68
25.25
M
M
M
M
M
M
M
M
M
NCEI Climatology
27.90
30.37
38.90
50.80
61.35
69.90
73.85
72.30
65.40
53.70
42.46
33.00
Average Relative Humidity [%]
This value is computed via a simple average of available observations weighted
by the duration between observations.
