IEM :: Monthly Summaries

Station Data & Metadata
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[ACMP1] Allegheny River AT CW Bill Young Dam [2010-] or select from map

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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 (USC00360022) 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
2010	M	M	M	M	M	M	M	M	M	M	M	0.02
2011	3.26	3.33	5.55	6.10	5.50	1.97	4.48	2.43	2.29	2.18	1.57	1.07
2012	1.20	18.16	2.86	1.00	1.26	0.59	3.20	1.58	1.62	3.29	1.06	1.83
2013	M	M	M	M	M	M	M	M	M	M	M	M
2014	M	M	M	M	M	M	M	2.68	0.57	0.96	0.94	1.97
2015	1.78	0.80	2.49	4.03	2.54	5.76	1.33	0.41	5.87	1.08	M	M
2016	M	M	M	M	M	M	M	M	M	M	M	M
2017	M	M	M	M	M	M	M	M	M	M	M	M
2018	M	M	M	M	M	M	M	M	M	M	M	0.00
2019	M	M	M	M	M	M	M	M	M	M	M	M
2020	M	M	M	M	M	M	M	M	M	M	M	M
2021	1.27	M	M	M	M	M	M	M	M	M	M	M
2022	M	M	M	M	M	M	M	M	M	M	M	M
2023	M	M	M	0.04	0.00	1.01	1.77	3.67	0.12	M	0.00	0.00
2024	0.00	M	M	M	M	M	M	M	M	M	M	M
2025	0.00	0.68	M	M	M	M	M	M	M	M	M	M
NCEI Climatology	3.38	2.98	3.68	3.70	3.91	4.45	4.54	3.56	4.18	3.32	3.26	3.66

Average Wind Speed [MPH]

Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2010	M	M	M	M	M	M	M	M	M	M	M	M
2011	M	M	M	M	M	M	M	M	M	M	M	M
2012	M	M	M	M	M	M	M	M	M	M	M	M
2013	M	M	M	M	M	M	M	M	M	M	M	M
2014	M	M	M	M	M	M	M	M	M	M	M	M
2015	M	M	M	M	M	M	M	M	M	M	M	M
2016	M	M	M	M	M	M	M	M	M	M	M	M
2017	M	M	M	M	M	M	M	M	M	M	M	M
2018	M	M	M	M	M	M	M	M	M	M	M	M
2019	M	M	M	M	M	M	M	M	M	M	M	M
2020	M	M	M	M	M	M	M	M	M	M	M	M
2021	M	M	M	M	M	M	M	M	M	M	M	M
2022	M	M	M	M	M	M	M	M	M	M	M	M
2023	M	M	M	M	M	M	M	M	M	M	M	M
2024	M	M	M	M	M	M	M	M	M	M	M	M
2025	M	M	M	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
2010	M	M	M	M	M	M	M	M	M	M	M	44.50
2011	31.58	40.25	49.06	64.70	77.42	85.23	91.16	85.03	76.17	59.77	52.70	42.39
2012	38.10	41.52	59.13	60.20	79.48	84.10	89.84	83.42	73.83	61.77	45.83	54.40
2013	M	M	M	M	M	M	M	M	M	M	M	M
2014	M	M	M	M	M	M	M	79.21	71.90	60.61	45.40	40.94
2015	31.90	26.93	41.38	61.73	75.87	76.00	80.77	79.84	72.07	51.36	M	M
2016	M	M	M	M	M	M	M	M	M	M	M	M
2017	M	M	M	M	M	M	M	M	M	M	M	M
2018	M	M	M	M	M	M	M	M	M	M	M	35.00
2019	M	M	M	M	M	M	M	M	M	M	M	M
2020	M	M	M	M	M	M	M	M	M	M	M	M
2021	41.29	M	M	M	M	M	M	M	M	M	M	M
2022	M	M	M	M	M	M	M	M	M	M	M	M
2023	M	M	M	M	M	M	M	M	M	M	M	M
2024	M	M	M	M	M	M	M	M	M	M	M	M
2025	M	M	M	M	M	M	M	M	M	M	M	M
NCEI Climatology	35.80	39.74	48.59	61.80	71.80	79.20	83.20	81.90	75.49	63.50	51.39	41.60

Average Daily Low Temperature [F]

Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2010	M	M	M	M	M	M	M	M	M	M	M	22.00
2011	14.19	18.75	26.03	40.63	51.32	58.50	65.55	61.13	57.52	43.84	35.33	30.00
2012	24.68	27.79	39.81	42.93	61.48	67.43	73.74	65.94	58.07	45.65	31.17	40.60
2013	M	M	M	M	M	M	M	M	M	M	M	M
2014	M	M	M	M	M	M	M	64.79	56.23	47.74	31.80	31.39
2015	19.71	11.50	27.66	43.40	56.61	62.63	64.87	62.97	58.63	48.84	M	M
2016	M	M	M	M	M	M	M	M	M	M	M	M
2017	M	M	M	M	M	M	M	M	M	M	M	M
2018	M	M	M	M	M	M	M	M	M	M	M	31.00
2019	M	M	M	M	M	M	M	M	M	M	M	M
2020	M	M	M	M	M	M	M	M	M	M	M	M
2021	33.71	M	M	M	M	M	M	M	M	M	M	M
2022	M	M	M	M	M	M	M	M	M	M	M	M
2023	M	M	M	M	M	M	M	M	M	M	M	M
2024	M	M	M	M	M	M	M	M	M	M	M	M
2025	M	M	M	M	M	M	M	M	M	M	M	M
NCEI Climatology	19.40	20.99	27.50	37.90	48.50	57.50	62.20	60.50	53.70	42.60	31.69	25.50

Average Daily Temperature (high+low)/2 [F]

Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2010	M	M	M	M	M	M	M	M	M	M	M	33.25
2011	22.89	29.50	37.55	52.67	64.37	71.87	78.35	73.08	66.84	51.81	44.02	36.19
2012	31.39	34.66	49.47	51.57	70.48	75.77	81.79	74.68	65.95	53.71	38.50	47.50
2013	M	M	M	M	M	M	M	M	M	M	M	M
2014	M	M	M	M	M	M	M	72.00	64.07	54.18	38.60	36.16
2015	25.81	19.21	34.52	52.57	66.24	69.32	72.82	71.40	65.35	50.10	M	M
2016	M	M	M	M	M	M	M	M	M	M	M	M
2017	M	M	M	M	M	M	M	M	M	M	M	M
2018	M	M	M	M	M	M	M	M	M	M	M	33.00
2019	M	M	M	M	M	M	M	M	M	M	M	M
2020	M	M	M	M	M	M	M	M	M	M	M	M
2021	37.50	M	M	M	M	M	M	M	M	M	M	M
2022	M	M	M	M	M	M	M	M	M	M	M	M
2023	M	M	M	M	M	M	M	M	M	M	M	M
2024	M	M	M	M	M	M	M	M	M	M	M	M
2025	M	M	M	M	M	M	M	M	M	M	M	M
NCEI Climatology	27.60	30.36	38.05	49.85	60.15	68.35	72.70	71.20	64.59	53.05	41.54	33.55

Average Relative Humidity [%]

This value is computed via a simple average of available observations weighted by the duration between observations.

Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2010	M	M	M	M	M	M	M	M	M	M	M	M
2011	M	M	M	M	M	M	M	M	M	M	M	M
2012	M	M	M	M	M	M	M	M	M	M	M	M
2013	M	M	M	M	M	M	M	M	M	M	M	M
2014	M	M	M	M	M	M	M	M	M	M	M	M
2015	M	M	M	M	M	M	M	M	M	M	M	M
2016	M	M	M	M	M	M	M	M	M	M	M	M
2017	M	M	M	M	M	M	M	M	M	M	M	M
2018	M	M	M	M	M	M	M	M	M	M	M	M
2019	M	M	M	M	M	M	M	M	M	M	M	M
2020	M	M	M	M	M	M	M	M	M	M	M	M
2021	M	M	M	M	M	M	M	M	M	M	M	M
2022	M	M	M	M	M	M	M	M	M	M	M	M
2023	M	M	M	M	M	M	M	M	M	M	M	M
2024	M	M	M	M	M	M	M	M	M	M	M	M
2025	M	M	M	M	M	M	M	M	M	M	M	M