All-time weather records — Seymour, WI

Record high
100.0°F
July 15, 2006
Record low
-26.0°F
January 31, 2019
Wettest day
3.98 in
August 8, 2021

Climate change signal in Seymour

50.8%

of Seymour's all-time daily heat records were set in the last decade (186 of 366 records since 2015).

36.3%

of all-time daily cold records were set in the last decade (133 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
105
157
2010s
141
147
2020s
120
62

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 52.0°F — Jan 11, 2012 -26.0°F — Jan 31, 2019 0.91 in — Jan 7, 2019
February 69.1°F — Feb 27, 2024 -17.0°F — Feb 18, 2006 1.09 in — Feb 17, 2008
March 82.0°F — Mar 21, 2012 -11.9°F — Mar 4, 2019 1.80 in — Mar 5, 2022
April 86.0°F — Apr 12, 2023 10.9°F — Apr 7, 2018 1.95 in — Apr 26, 2011
May 93.0°F — May 27, 2018 27.0°F — May 3, 2004 2.92 in — May 28, 2020
June 95.0°F — Jun 23, 2009 37.9°F — Jun 3, 2019 2.02 in — Jun 26, 2021
July 100.0°F — Jul 15, 2006 46.0°F — Jul 13, 2009 1.94 in — Jul 19, 2012
August 93.9°F — Aug 1, 2007 39.9°F — Aug 21, 2004 3.98 in — Aug 8, 2021
September 93.0°F — Sep 3, 2023 33.1°F — Sep 15, 2007 2.52 in — Sep 23, 2010
October 87.1°F — Oct 3, 2025 21.0°F — Oct 31, 2020 2.91 in — Oct 22, 2020
November 73.9°F — Nov 8, 2020 6.1°F — Nov 12, 2019 1.70 in — Nov 9, 2011
December 64.0°F — Dec 15, 2021 -16.1°F — Dec 24, 2004 1.90 in — Dec 14, 2015

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