All-time weather records — New Berlin, WI

Record high
102.0°F
July 5, 2012
Record low
-24.0°F
January 31, 2019
Wettest day
6.45 in
August 10, 2025

Climate change signal in New Berlin

51.1%

of New Berlin's all-time daily heat records were set in the last decade (187 of 366 records since 2015).

47.3%

of all-time daily cold records were set in the last decade (173 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 #
2000s
86
91
2010s
193
186
2020s
87
89

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 2004, the latest in 2026. Period of observation: 2004-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 60.1°F — Jan 8, 2008 -24.0°F — Jan 31, 2019 1.50 in — Jan 22, 2018
February 72.0°F — Feb 23, 2017 -20.0°F — Feb 1, 2019 1.32 in — Feb 21, 2011
March 84.9°F — Mar 22, 2012 -13.0°F — Mar 4, 2019 1.79 in — Mar 22, 2008
April 84.9°F — Apr 2, 2010 12.0°F — Apr 2, 2018 2.81 in — Apr 18, 2013
May 97.0°F — May 28, 2018 23.0°F — May 12, 2021 3.12 in — May 18, 2020
June 97.0°F — Jun 8, 2011 35.1°F — Jun 4, 2009 5.00 in — Jun 8, 2008
July 102.0°F — Jul 5, 2012 45.0°F — Jul 9, 2021 4.45 in — Jul 23, 2010
August 99.0°F — Aug 24, 2023 39.9°F — Aug 18, 2012 6.45 in — Aug 10, 2025
September 95.0°F — Sep 11, 2013 28.9°F — Sep 19, 2012 5.12 in — Sep 12, 2022
October 99.0°F — Oct 3, 2013 15.1°F — Oct 31, 2020 2.78 in — Oct 2, 2019
November 78.1°F — Nov 11, 2022 0.0°F — Nov 12, 2019 2.25 in — Nov 18, 2013
December 66.0°F — Dec 4, 2012 -15.0°F — Dec 19, 2016 1.90 in — Dec 11, 2021

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