Frost dates for Michigan
In Michigan, the typical last spring frost runs from Apr 20 in Detroit to May 22 in Marquette. The typical first fall frost runs from Sep 29 in Marquette to Oct 27 in Detroit.
So far this fall, 1 of the 4 cities in Michigan that file a daily climate report have logged a freeze.
NCEI U.S. Climate Normals 1991-2020, annual/seasonal (c20230404)
Frost dates by city in Michigan
| City | Last spring | First fall | Season | This fall |
|---|---|---|---|---|
| Detroit | Apr 20 | Oct 27 | 188 days | No freeze yet |
| Grand Rapids | Apr 29 | Oct 20 | 174 days | No freeze yet |
| Marquette | May 22 | Sep 29 | 129 days | Sep 22, 32°F |
| Sault Ste Marie | May 9 | Oct 11 | 151 days | No freeze yet |
A typical date is the median: half of years have an earlier last spring frost, half a later one. An early year means 1 year in 10, and a late year means 1 year in 10. Dates come from the U.S. Climate Normals for 1991-2020, published by NOAA's National Centers for Environmental Information, using a daily low of 32F or below as a freeze.
Frost dates by ZIP code and city
The daily climate report is issued by the local National Weather Service forecast office and delivered to this page by the Iowa Environmental Mesonet of Iowa State University. Under 17 U.S.C. 105, no copyright attaches to the government-produced figures on this page, including reports, alerts, station observations, and normals, which were created by the National Weather Service and other NOAA offices. The notice that 17 U.S.C. 403 requires appears in this sentence. It does not imply endorsement by or affiliation with those agencies. See: Data sources and attribution.