Freeport, MN 56331 Frost Dates
Frost dates for Freeport, MN, ZIP 56331
Around 05/04 is the usual last spring frost, about 249 days away. The first fall frost typically arrives around 10/01, about 148 frost-free days later.
The USDA Plant Hardiness Zone Map puts Freeport 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 Freeport 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
05/04 is the middle of 30 years of NOAA records, not a promise. Plant by 04/22 and you're betting against frost in roughly 9 years out of 10. 05/19 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Freeport compares
About 148 days separate Freeport's last and first frost, putting it 35,769 of 40,283 ZIP codes nationally. Within MN, it ranks 587 of 943.
Learn more
local microclimates explains what one yard in Freeport can differ from the 56331 normal, and zone vs. frost date explains why Zone 4b and Freeport's frost date answer different questions.