Greenville, MI 49326 Frost Dates
Greenville, MI: when does the frost end?
The last spring frost here typically falls around 05/18, about 263 days from today. Fall's first freeze usually shows up around 09/28, roughly 133 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Greenville 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 4 weeks until Greenville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/18 isn't a guarantee
05/18 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/29 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/03 and only about 1 year in 10 sees frost after that.
Greenville against the rest of the dataset
About 133 days separate Greenville's last and first frost, putting it 38,039 of 40,283 ZIP codes nationally. Within MI, it ranks 990 of 1,153.
Learn more
Before leaning on 49326's figures: the frost range explains how to read the range around Greenville's dates instead of trusting one, while local microclimates explains what one yard in Greenville can differ from the 49326 normal.