St. Stephen, MN 56375 Frost Dates
When can you plant in St. Stephen, MN?
The last spring frost here typically falls around 05/10, about 255 days from today. The first fall frost typically arrives around 09/29, about 140 frost-free days later.
The USDA Plant Hardiness Zone Map puts St. Stephen 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 5 weeks of growing season left in St. Stephen 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
05/10 is the middle of 30 years of NOAA records, not a promise. Plant by 04/30 and you're betting against frost in roughly 9 years out of 10. 05/22 is the safer bet, historically only a 1-in-10 chance of frost that late.
How St. Stephen compares
About 140 days separate St. Stephen's last and first frost, putting it 37,084 of 40,283 ZIP codes nationally. Within MN, it ranks 741 of 943.
Learn more
the frost range covers how to read the range around St. Stephen's dates instead of trusting one. local microclimates covers what one yard in St. Stephen can differ from the 56375 normal.