Farmington, MN 55024 Frost Dates
Frost dates for Farmington, MN, ZIP 55024
Typically, the last spring freeze lands around 04/27, roughly 242 days out. The first fall frost typically arrives around 10/10, about 166 frost-free days later.
The USDA Plant Hardiness Zone Map puts Farmington in Zone 5a (-20 to -15°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 5a around Farmington has about 6 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 Farmington's last frost
04/27 is the middle of 30 years of NOAA records, not a promise. Plant by 04/12 and you're betting against frost in roughly 9 years out of 10. 05/10 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Farmington compares
Farmington's growing season runs about 166 days, ranking 30,301 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 100 of 943.
Learn more
zone vs. frost date explains why Zone 5a and Farmington's frost date answer different questions, and the frost range explains how to read the range around Farmington's dates instead of trusting one.