Karlstad, MN 56732 Frost Dates
When can you plant in Karlstad, MN?
Around 05/15 is the usual last spring frost, about 260 days away. The first fall frost typically arrives around 09/26, about 134 frost-free days later.
The USDA Plant Hardiness Zone Map puts Karlstad 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
About 4 weeks of growing season left in Karlstad before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Karlstad's last frost
05/15 is the middle of 30 years of NOAA records, not a promise. Plant by 05/01 and you're betting against frost in roughly 9 years out of 10. 05/28 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Karlstad compares
Karlstad's growing season runs about 134 days, ranking 38,002 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 813 of 943.
Learn more
the frost range covers how to read the range around Karlstad's dates instead of trusting one. local microclimates covers what one yard in Karlstad can differ from the 56732 normal.