Mendon, MI 49066 Frost Dates
Frost dates for Mendon, MI, ZIP 49066
Around 04/30 is the usual last spring frost, about 245 days away. The first fall frost typically arrives around 10/19, about 170 frost-free days later.
Mendon 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
Zone 6a around Mendon has about 7 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 04/30 isn't a guarantee
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/16 and you're betting against frost in roughly 9 years out of 10. 05/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mendon compares
About 170 days separate Mendon's last and first frost, putting it 29,131 of 40,283 ZIP codes nationally. Within MI, it ranks 336 of 1,153.
Learn more
zone vs. frost date explains why Zone 6a and Mendon's frost date answer different questions, and the frost range explains how to read the range around Mendon's dates instead of trusting one.