All-time weather records — Rochester, WI

Record high
102.9°F
July 6, 2012
Record low
-27.0°F
February 1, 2019
Wettest day
4.38 in
July 12, 2017

Climate change signal in Rochester

74.3%

of Rochester's all-time daily heat records were set in the last decade (272 of 366 records since 2015).

64.5%

of all-time daily cold records were set in the last decade (236 of 366 records since 2015).

If records were spread evenly across the station's history, you'd expect roughly 5% per decade. Decade-by-decade, here's where each record-breaking day was set:

Decade Heat records set # Cold records set #
2010s
215
261
2020s
151
105

Records are the all-time daily extremes that are still standing — each daily record can only be held by one year. The station's earliest hot record was set in 2011, the latest in 2026. Period of observation: 2011-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 59.0°F — Jan 9, 2026 -26.0°F — Jan 31, 2019 1.42 in — Jan 23, 2018
February 75.0°F — Feb 28, 2024 -27.0°F — Feb 1, 2019 1.90 in — Feb 28, 2023
March 82.9°F — Mar 22, 2012 -14.1°F — Mar 1, 2014 1.92 in — Mar 16, 2026
April 82.0°F — Apr 14, 2023 16.0°F — Apr 8, 2018 2.88 in — Apr 10, 2013
May 93.9°F — May 28, 2018 27.0°F — May 9, 2020 2.17 in — May 18, 2020
June 97.0°F — Jun 29, 2012 36.0°F — Jun 1, 2015 2.92 in — Jun 22, 2013
July 102.9°F — Jul 6, 2012 43.0°F — Jul 2, 2015 4.38 in — Jul 12, 2017
August 95.0°F — Aug 10, 2018 44.1°F — Aug 25, 2017 4.05 in — Aug 15, 2023
September 93.0°F — Sep 23, 2017 32.0°F — Sep 24, 2012 3.75 in — Sep 18, 2015
October 86.0°F — Oct 4, 2025 21.0°F — Oct 31, 2020 2.45 in — Oct 2, 2019
November 77.0°F — Nov 11, 2020 1.0°F — Nov 21, 2014 2.50 in — Nov 18, 2013
December 66.9°F — Dec 4, 2012 -17.0°F — Dec 28, 2017 1.90 in — Dec 29, 2015

Click a month to see every daily record for that month in Rochester.