Annandale, MN 55302 Frost Dates
Frost dates for Annandale, MN, ZIP 55302
Typically, the last spring freeze lands around 05/02, roughly 247 days out. The first fall frost typically arrives around 10/05, about 156 frost-free days later.
The USDA Plant Hardiness Zone Map puts Annandale in Zone 4b (-25 to -20°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 4b around Annandale 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
05/02 is the middle of 30 years of NOAA records, not a promise. Plant by 04/19 and you're betting against frost in roughly 9 years out of 10. 05/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Annandale compares
Annandale's growing season runs about 156 days, ranking 33,618 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 313 of 943.
Learn more
zone vs. frost date explains why Zone 4b and Annandale's frost date answer different questions, and the frost range explains how to read the range around Annandale's dates instead of trusting one.