Climax, MN 56523 Frost Dates
When can you plant in Climax, MN?
Around 05/11 is the usual last spring frost, about 256 days away. The first fall frost typically arrives around 09/27, about 138 frost-free days later.
Zone 4a (-30 to -25°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Climax, not a forecast for this year.
What to do before the first frost
About 4 weeks of growing season left in Climax before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/11 isn't a guarantee
05/11 is the middle of 30 years of NOAA records, not a promise. Plant by 04/28 and you're betting against frost in roughly 9 years out of 10. 05/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Climax compares
At roughly 138 frost-free days, Climax places 37,456 of 40,283 ZIP codes in this dataset. Within MN, it ranks 775 of 943.
Learn more
zone vs. frost date covers why Zone 4a and Climax's frost date answer different questions. the frost range covers how to read the range around Climax's dates instead of trusting one.