Woodstock, MN 56186 Frost Dates
Frost dates for Woodstock, MN, ZIP 56186
Typically, the last spring freeze lands around 05/07, roughly 252 days out. The first fall frost typically arrives around 09/29, about 145 frost-free days later.
The USDA Plant Hardiness Zone Map puts Woodstock in Zone 4b (-25 to -20°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 4b around Woodstock 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 05/07 isn't a guarantee
05/07 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. 05/19 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Woodstock compares
Woodstock's growing season runs about 145 days, ranking 36,306 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 640 of 943.
Learn more
the frost range explains how to read the range around Woodstock's dates instead of trusting one, and local microclimates explains what one yard in Woodstock can differ from the 56186 normal.