Grey Eagle, MN 56336 Frost Dates
Frost dates for Grey Eagle, MN, ZIP 56336
The last spring frost here typically falls around 05/04, about 249 days from today. The first fall frost typically arrives around 10/01, about 148 frost-free days later.
Zone 4b (-25 to -20°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 Grey Eagle, not a forecast for this year.
What to do before the first frost
Zone 4b around Grey Eagle 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 05/04 isn't a guarantee
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 Grey Eagle compares
About 148 days separate Grey Eagle's last and first frost, putting it 35,795 of 40,283 ZIP codes nationally. Within MN, it ranks 596 of 943.
Learn more
local microclimates explains what one yard in Grey Eagle can differ from the 56336 normal, and zone vs. frost date explains why Zone 4b and Grey Eagle's frost date answer different questions.