Constantine, MI 49042 Frost Dates
Constantine, MI: when does the frost end?
Typically, the last spring freeze lands around 04/26, roughly 241 days out. Fall's first freeze usually shows up around 10/21, roughly 175 days after the last spring frost.
Zone 6a (-10 to -5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Constantine, not a forecast for this year.
Stretching the season past the first frost
With roughly 8 weeks until Constantine's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Constantine's last frost
04/26 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/13 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/12 and only about 1 year in 10 sees frost after that.
Constantine against the rest of the dataset
At roughly 175 frost-free days, Constantine places 26,986 of 40,283 ZIP codes in this dataset. Within MI, it ranks 148 of 1,153.
Learn more
Before leaning on 49042's figures: local microclimates explains what one yard in Constantine can differ from the 49042 normal, while zone vs. frost date explains why Zone 6a and Constantine's frost date answer different questions.