Laporte, MN 56461 Frost Dates
When can you plant in Laporte, MN?
Typically, the last spring freeze lands around 05/17, roughly 262 days out. The first fall frost typically arrives around 09/26, about 131 frost-free days later.
Laporte sits in USDA Zone 3b (-35 to -30°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
About 4 weeks of growing season left in Laporte 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
05/17 is the middle of 30 years of NOAA records, not a promise. Plant by 05/03 and you're betting against frost in roughly 9 years out of 10. 05/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Laporte compares
At roughly 131 frost-free days, Laporte places 38,344 of 40,283 ZIP codes in this dataset. Within MN, it ranks 839 of 943.
Learn more
zone vs. frost date covers why Zone 3b and Laporte's frost date answer different questions. the frost range covers how to read the range around Laporte's dates instead of trusting one.