Fisher, MN 56722 Frost Dates
Frost dates for Fisher, MN, ZIP 56722
The last spring frost here typically falls around 05/11, about 256 days from today. The first fall frost typically arrives around 09/27, about 138 frost-free days later.
Fisher sits in USDA Zone 4a (-30 to -25°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 4a around Fisher has about 4 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
05/11 is the middle of 30 years of NOAA records, not a promise. Plant by 04/28 and you're betting against frost in roughly 9 years out of 10. 05/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Fisher compares
About 138 days separate Fisher's last and first frost, putting it 37,449 of 40,283 ZIP codes nationally. Within MN, it ranks 773 of 943.
Learn more
zone vs. frost date explains why Zone 4a and Fisher's frost date answer different questions, and the frost range explains how to read the range around Fisher's dates instead of trusting one.