Le Roy, MN 55951 Frost Dates
Frost dates for Le Roy, MN, ZIP 55951
Typically, the last spring freeze lands around 05/06, roughly 251 days out. The first fall frost typically arrives around 10/01, about 146 frost-free days later.
Le Roy sits in USDA Zone 4b (-25 to -20°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 4b around Le Roy 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.
The actual range around Le Roy's last frost
05/06 is the middle of 30 years of NOAA records, not a promise. Plant by 04/23 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 Le Roy compares
About 146 days separate Le Roy's last and first frost, putting it 36,071 of 40,283 ZIP codes nationally. Within MN, it ranks 622 of 943.
Learn more
local microclimates explains what one yard in Le Roy can differ from the 55951 normal, and zone vs. frost date explains why Zone 4b and Le Roy's frost date answer different questions.