Calumet, MI 49913 Frost Dates
Calumet, MI: when does the frost end?
The last spring frost here typically falls around 05/17, about 262 days from today. Fall's first freeze usually shows up around 10/01, roughly 138 days after the last spring frost.
Zone 5b (-15 to -10°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 Calumet, not a forecast for this year.
Stretching the season past the first frost
With roughly 5 weeks until Calumet's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/01 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.
Calumet against the rest of the dataset
About 138 days separate Calumet's last and first frost, putting it 37,431 of 40,283 ZIP codes nationally. Within MI, it ranks 933 of 1,153.
Learn more
Before leaning on 49913's figures: local microclimates explains what one yard in Calumet can differ from the 49913 normal, while zone vs. frost date explains why Zone 5b and Calumet's frost date answer different questions.