Nashua, MN 56565 Frost Dates
Frost dates for Nashua, MN, ZIP 56565
Around 05/03 is the usual last spring frost, about 248 days away. The first fall frost typically arrives around 10/03, about 154 frost-free days later.
Nashua 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 Nashua 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 05/03 isn't a guarantee
05/03 is the middle of 30 years of NOAA records, not a promise. Plant by 04/19 and you're betting against frost in roughly 9 years out of 10. 05/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Nashua compares
About 154 days separate Nashua's last and first frost, putting it 34,478 of 40,283 ZIP codes nationally. Within MN, it ranks 398 of 943.
Learn more
local microclimates explains what one yard in Nashua can differ from the 56565 normal, and zone vs. frost date explains why Zone 4a and Nashua's frost date answer different questions.