Richville, MN 56576 Frost Dates
Frost dates for Richville, MN, ZIP 56576
The last spring frost here typically falls around 05/05, about 250 days from today. The first fall frost typically arrives around 10/05, about 153 frost-free days later.
Zone 4a (-30 to -25°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 Richville, not a forecast for this year.
What to do before the first frost
Zone 4a around Richville 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 05/05 isn't a guarantee
05/05 is the middle of 30 years of NOAA records, not a promise. Plant by 04/24 and you're betting against frost in roughly 9 years out of 10. 05/18 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Richville compares
At roughly 153 frost-free days, Richville places 34,659 of 40,283 ZIP codes in this dataset. Within MN, it ranks 433 of 943.
Learn more
the frost range explains how to read the range around Richville's dates instead of trusting one, and local microclimates explains what one yard in Richville can differ from the 56576 normal.