St. Hilaire, MN 56754 Frost Dates
When can you plant in St. Hilaire, MN?
Around 05/14 is the usual last spring frost, about 259 days away. The first fall frost typically arrives around 09/28, about 135 frost-free days later.
The USDA Plant Hardiness Zone Map puts St. Hilaire in Zone 3b (-35 to -30°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 St. Hilaire before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/14 isn't a guarantee
05/14 is the middle of 30 years of NOAA records, not a promise. Plant by 05/02 and you're betting against frost in roughly 9 years out of 10. 05/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How St. Hilaire compares
St. Hilaire's growing season runs about 135 days, ranking 37,917 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 805 of 943.
Learn more
the frost range covers how to read the range around St. Hilaire's dates instead of trusting one. local microclimates covers what one yard in St. Hilaire can differ from the 56754 normal.