Wyoming, MN 55092 Frost Dates
Frost dates for Wyoming, MN, ZIP 55092
Typically, the last spring freeze lands around 05/03, roughly 248 days out. The first fall frost typically arrives around 10/05, about 154 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 Wyoming, not a forecast for this year.
What to do before the first frost
Zone 4b around Wyoming 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
05/03 is the middle of 30 years of NOAA records, not a promise. Plant by 04/20 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 Wyoming compares
About 154 days separate Wyoming's last and first frost, putting it 34,258 of 40,283 ZIP codes nationally. Within MN, it ranks 385 of 943.
Learn more
zone vs. frost date explains why Zone 4b and Wyoming's frost date answer different questions, and the frost range explains how to read the range around Wyoming's dates instead of trusting one.