Maple Lake, MN 55358 Frost Dates
Frost dates for Maple Lake, MN, ZIP 55358
Around 04/30 is the usual last spring frost, about 245 days away. The first fall frost typically arrives around 10/09, about 163 frost-free days later.
The USDA Plant Hardiness Zone Map puts Maple Lake 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 Maple Lake has about 6 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 04/30 isn't a guarantee
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/15 and you're betting against frost in roughly 9 years out of 10. 05/13 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Maple Lake compares
Maple Lake's growing season runs about 163 days, ranking 31,402 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 166 of 943.
Learn more
the frost range explains how to read the range around Maple Lake's dates instead of trusting one, and local microclimates explains what one yard in Maple Lake can differ from the 55358 normal.