Newfolden, MN 56738 Frost Dates
Frost dates for Newfolden, MN, ZIP 56738
Typically, the last spring freeze lands around 05/06, roughly 251 days out. The first fall frost typically arrives around 10/03, about 148 frost-free days later.
The USDA Plant Hardiness Zone Map puts Newfolden in Zone 3b (-35 to -30°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 3b around Newfolden 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 05/06 isn't a guarantee
05/06 is the middle of 30 years of NOAA records, not a promise. Plant by 04/25 and you're betting against frost in roughly 9 years out of 10. 05/20 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Newfolden compares
Newfolden's growing season runs about 148 days, ranking 35,793 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 595 of 943.
Learn more
local microclimates explains what one yard in Newfolden can differ from the 56738 normal, and zone vs. frost date explains why Zone 3b and Newfolden's frost date answer different questions.