Coldwater, MI 49036 Frost Dates
Coldwater, MI: when does the frost end?
Typically, the last spring freeze lands around 04/30, roughly 245 days out. Fall's first freeze usually shows up around 10/16, roughly 167 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Coldwater in Zone 6a (-10 to -5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 7 weeks until Coldwater's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/30 isn't a guarantee
04/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/15 and only about 1 year in 10 sees frost after that.
Coldwater against the rest of the dataset
Coldwater's growing season runs about 167 days, ranking 29,900 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 360 of 1,153.
Learn more
Before leaning on 49036's figures: zone vs. frost date explains why Zone 6a and Coldwater's frost date answer different questions, while the frost range explains how to read the range around Coldwater's dates instead of trusting one.