Dexter, MN 55926 Frost Dates
When can you plant in Dexter, MN?
Around 05/06 is the usual last spring frost, about 251 days away. The first fall frost typically arrives around 10/01, about 146 frost-free days later.
The USDA Plant Hardiness Zone Map puts Dexter 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 Dexter before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Dexter's last frost
05/06 is the middle of 30 years of NOAA records, not a promise. Plant by 04/23 and you're betting against frost in roughly 9 years out of 10. 05/18 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Dexter compares
About 146 days separate Dexter's last and first frost, putting it 36,126 of 40,283 ZIP codes nationally. Within MN, it ranks 626 of 943.
Learn more
local microclimates covers what one yard in Dexter can differ from the 55926 normal. zone vs. frost date covers why Zone 4b and Dexter's frost date answer different questions.