Alma, MI 48832 Frost Dates
When can you plant in Alma, MI?
Typically, the last spring freeze lands around 05/01, roughly 246 days out. The first fall frost typically arrives around 10/13, about 164 frost-free days later.
Alma sits in USDA Zone 6a (-10 to -5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
About 7 weeks of growing season left in Alma before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Alma's last frost
05/01 is the middle of 30 years of NOAA records, not a promise. Plant by 04/17 and you're betting against frost in roughly 9 years out of 10. 05/19 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Alma compares
At roughly 164 frost-free days, Alma places 30,883 of 40,283 ZIP codes in this dataset. Within MI, it ranks 475 of 1,153.
Learn more
local microclimates covers what one yard in Alma can differ from the 48832 normal. zone vs. frost date covers why Zone 6a and Alma's frost date answer different questions.