Hillman, MI 49709 Frost Dates
Frost dates for Hillman, MI, ZIP 49709
The last spring frost here typically falls around 05/22, about 267 days from today. The first fall frost typically arrives around 09/27, about 127 frost-free days later.
Hillman sits in USDA Zone 5a (-20 to -15°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 5a around Hillman has about 4 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.
The actual range around Hillman's last frost
05/22 is the middle of 30 years of NOAA records, not a promise. Plant by 05/05 and you're betting against frost in roughly 9 years out of 10. 06/05 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Hillman compares
Hillman's growing season runs about 127 days, ranking 38,646 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 1,063 of 1,153.
Learn more
the frost range explains how to read the range around Hillman's dates instead of trusting one, and local microclimates explains what one yard in Hillman can differ from the 49709 normal.