Alma, MI 48877 Frost Dates
Alma, MI: when does the frost end?
The last spring frost here typically falls around 05/01, about 246 days from today. Fall's first freeze usually shows up around 10/13, roughly 164 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 Alma, not a forecast for this year.
Stretching the season past the first frost
With roughly 7 weeks until Alma's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Alma's last frost
05/01 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 05/19 and only about 1 year in 10 sees frost after that.
Alma against the rest of the dataset
Alma's growing season runs about 164 days, ranking 30,884 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 476 of 1,153.
Learn more
Before leaning on 48877's figures: local microclimates explains what one yard in Alma can differ from the 48877 normal, while zone vs. frost date explains why Zone 6a and Alma's frost date answer different questions.