Flint, MI 48553 Frost Dates
When can you plant in Flint, MI?
Typically, the last spring freeze lands around 05/06, roughly 251 days out. The first fall frost typically arrives around 10/10, about 155 frost-free days later.
Flint 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 6 weeks of growing season left in Flint before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
05/06 is the middle of 30 years of NOAA records, not a promise. Plant by 04/21 and you're betting against frost in roughly 9 years out of 10. 05/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Flint compares
About 155 days separate Flint's last and first frost, putting it 33,907 of 40,283 ZIP codes nationally. Within MI, it ranks 771 of 1,153.
Learn more
local microclimates covers what one yard in Flint can differ from the 48553 normal. zone vs. frost date covers why Zone 6a and Flint's frost date answer different questions.