Jasper, MN 56144 Frost Dates
When can you plant in Jasper, MN?
The last spring frost here typically falls around 05/04, about 249 days from today. The first fall frost typically arrives around 10/02, about 152 frost-free days later.
The USDA Plant Hardiness Zone Map puts Jasper 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
About 5 weeks of growing season left in Jasper before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/04 isn't a guarantee
05/04 is the middle of 30 years of NOAA records, not a promise. Plant by 04/21 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 Jasper compares
About 152 days separate Jasper's last and first frost, putting it 34,852 of 40,283 ZIP codes nationally. Within MN, it ranks 461 of 943.
Learn more
the frost range covers how to read the range around Jasper's dates instead of trusting one. local microclimates covers what one yard in Jasper can differ from the 56144 normal.