Windom, MN 56101 Frost Dates
Frost dates for Windom, MN, ZIP 56101
The last spring frost here typically falls around 04/30, about 245 days from today. The first fall frost typically arrives around 10/10, about 162 frost-free days later.
Zone 5a (-20 to -15°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 Windom, not a forecast for this year.
What to do before the first frost
Zone 5a around Windom 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 Windom's last frost
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/15 and you're betting against frost in roughly 9 years out of 10. 05/13 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Windom compares
At roughly 162 frost-free days, Windom places 31,718 of 40,283 ZIP codes in this dataset. Within MN, it ranks 177 of 943.
Learn more
the frost range explains how to read the range around Windom's dates instead of trusting one, and local microclimates explains what one yard in Windom can differ from the 56101 normal.