Baldwin, MI 49309 Frost Dates
Frost dates for Baldwin, MI, ZIP 49309
Around 05/17 is the usual last spring frost, about 262 days away. The first fall frost typically arrives around 10/01, about 137 frost-free days later.
Baldwin sits in USDA Zone 5b (-15 to -10°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
Zone 5b around Baldwin has about 5 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
05/17 is the middle of 30 years of NOAA records, not a promise. Plant by 04/30 and you're betting against frost in roughly 9 years out of 10. 06/01 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Baldwin compares
At roughly 137 frost-free days, Baldwin places 37,534 of 40,283 ZIP codes in this dataset. Within MI, it ranks 942 of 1,153.
Learn more
the frost range explains how to read the range around Baldwin's dates instead of trusting one, and local microclimates explains what one yard in Baldwin can differ from the 49309 normal.