SXUS73 KARX 251537 RERLSE RECORD EVENT REPORT NATIONAL WEATHER SERVICE LA CROSSE WI 1036 AM CDT TUE SEP 25 2018 ...WARMEST AVERAGE LOW TEMPERATURE FOR ASTRONOMICAL SUMMER IN LA CROSSE WI... FROM JUNE 21 THROUGH SEPTEMBER 21 (ASTRONOMICAL SUMMER), THE AVERAGE LOW TEMPERATURE WAS 64.0 DEGREES. THIS WAS 4.1 DEGREES WARMER THAN THE LONG-TERM AVERAGE OF 59.9 DEGREES. THIS WAS THE WARMEST EVER RECORDED FOR AN ASTRONOMICAL SUMMER. THE PREVIOUS RECORD WAS 63.7 DEGREES IN 1947. TEMPERATURE RECORDS DATE BACK TO 1873. $$ BOYNE