All-time weather records — Ann Arbor, MI

Record high
100.0°F
July 5, 2012
Record low
-18.0°F
January 31, 2019
Wettest day
5.33 in
June 26, 2021

Climate change signal in Ann Arbor

46.4%

of Ann Arbor's all-time daily heat records were set in the last decade (170 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
96
142
2010s
180
163
2020s
90
61

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 2003, the latest in 2026. Period of observation: 2003-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 63.0°F — Jan 8, 2008 -18.0°F — Jan 31, 2019 1.54 in — Jan 12, 2020
February 73.0°F — Feb 28, 2024 -18.0°F — Feb 20, 2015 1.58 in — Feb 27, 2013
March 87.1°F — Mar 23, 2012 -9.9°F — Mar 1, 2014 1.73 in — Mar 2, 2018
April 84.9°F — Apr 19, 2004 14.0°F — Apr 5, 2016 2.55 in — Apr 3, 2025
May 95.0°F — May 30, 2006 25.0°F — May 4, 2005 2.53 in — May 26, 2011
June 99.0°F — Jun 29, 2012 37.0°F — Jun 1, 2003 5.33 in — Jun 26, 2021
July 100.0°F — Jul 5, 2012 43.0°F — Jul 2, 2007 4.75 in — Jul 28, 2011
August 98.1°F — Aug 4, 2012 42.1°F — Aug 30, 2025 3.53 in — Aug 12, 2021
September 95.0°F — Sep 3, 2011 32.0°F — Sep 19, 2020 2.86 in — Sep 22, 2021
October 90.0°F — Oct 8, 2007 21.9°F — Oct 30, 2008 1.64 in — Oct 15, 2003
November 78.1°F — Nov 5, 2015 3.0°F — Nov 13, 2019 2.00 in — Nov 16, 2005
December 63.0°F — Dec 10, 2023 -9.9°F — Dec 28, 2017 1.73 in — Dec 1, 2006

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