All-time weather records — Mackinac Island, MI

Record high
89.1°F
July 14, 2016
Record low
-22.0°F
February 15, 2015
Wettest day
3.40 in
September 24, 2010

Climate change signal in Mackinac Island

65.3%

of Mackinac Island's all-time daily heat records were set in the last decade (239 of 366 records since 2015).

69.7%

of all-time daily cold records were set in the last decade (255 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
1
1
2010s
305
313
2020s
60
52

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 2009, the latest in 2021. Period of observation: 2009-2021.

Records by month

Month Hottest day Coldest day Wettest day
January 48.0°F — Jan 12, 2018 -20.9°F — Jan 28, 2019 0.77 in — Jan 8, 2019
February 46.9°F — Feb 23, 2017 -22.0°F — Feb 15, 2015 0.62 in — Feb 8, 2019
March 78.1°F — Mar 22, 2012 -11.0°F — Mar 5, 2014 0.95 in — Mar 2, 2017
April 70.0°F — Apr 28, 2017 12.0°F — Apr 4, 2016 2.09 in — Apr 30, 2020
May 82.9°F — May 27, 2010 25.0°F — May 8, 2020 1.09 in — May 19, 2017
June 86.0°F — Jun 21, 2012 35.1°F — Jun 1, 2020 2.75 in — Jun 29, 2017
July 89.1°F — Jul 14, 2016 43.0°F — Jul 8, 2015 1.36 in — Jul 18, 2016
August 87.1°F — Aug 5, 2016 45.0°F — Aug 1, 2019 2.42 in — Aug 19, 2010
September 86.0°F — Sep 7, 2015 34.0°F — Sep 18, 2020 3.40 in — Sep 24, 2010
October 75.9°F — Oct 4, 2017 21.9°F — Oct 30, 2020 2.04 in — Oct 4, 2018
November 73.9°F — Nov 10, 2020 3.0°F — Nov 10, 2017 1.25 in — Nov 24, 2014
December 60.1°F — Dec 17, 2021 -8.0°F — Dec 24, 2013 1.53 in — Dec 14, 2015

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