Frost Dates
Last spring freeze · first fall freeze · frost-free season, from NOAA 1991–2020 climate normals

Frost dates in Michigan

8 cities · typical last spring freeze → typical first fall freeze (32°F, median of 1991–2020 normals)

DetroitApril 27 → October 25Grand RapidsMay 6 → October 10WarrenApril 21 → October 31Sterling HeightsApril 30 → October 24Ann ArborMay 5 → October 10LansingMay 1 → October 13DearbornMay 1 → October 15LivoniaMay 1 → October 17