Clarissa, MN 56440 Frost Dates
When can you plant in Clarissa, MN?
Around 05/13 is the usual last spring frost, about 258 days away. The first fall frost typically arrives around 09/27, about 134 frost-free days later.
The USDA Plant Hardiness Zone Map puts Clarissa in Zone 4a (-30 to -25°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 Clarissa before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
05/13 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 Clarissa compares
At roughly 134 frost-free days, Clarissa places 38,003 of 40,283 ZIP codes in this dataset. Within MN, it ranks 814 of 943.
Learn more
zone vs. frost date covers why Zone 4a and Clarissa's frost date answer different questions. the frost range covers how to read the range around Clarissa's dates instead of trusting one.