Powers, MI 49807 Frost Dates
Frost dates for Powers, MI, ZIP 49807
Around 05/19 is the usual last spring frost, about 264 days away. The first fall frost typically arrives around 10/01, about 133 frost-free days later.
Zone 5a (-20 to -15°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 Powers, not a forecast for this year.
What to do before the first frost
Zone 5a around Powers 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.
Why 05/19 isn't a guarantee
05/19 is the middle of 30 years of NOAA records, not a promise. Plant by 05/02 and you're betting against frost in roughly 9 years out of 10. 06/03 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Powers compares
Powers's growing season runs about 133 days, ranking 38,119 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 1,007 of 1,153.
Learn more
zone vs. frost date explains why Zone 5a and Powers's frost date answer different questions, and the frost range explains how to read the range around Powers's dates instead of trusting one.