St. Paul, MN 55146 Frost Dates
When can you plant in St. Paul, MN?
The last spring frost here typically falls around 04/24, about 239 days from today. The first fall frost typically arrives around 10/16, about 174 frost-free days later.
The USDA Plant Hardiness Zone Map puts St. Paul in Zone 5a (-20 to -15°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 7 weeks of growing season left in St. Paul before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/24 isn't a guarantee
04/24 is the middle of 30 years of NOAA records, not a promise. Plant by 04/09 and you're betting against frost in roughly 9 years out of 10. 05/10 is the safer bet, historically only a 1-in-10 chance of frost that late.
How St. Paul compares
About 174 days separate St. Paul's last and first frost, putting it 27,307 of 40,283 ZIP codes nationally. Within MN, it ranks 65 of 943.
Learn more
zone vs. frost date covers why Zone 5a and St. Paul's frost date answer different questions. the frost range covers how to read the range around St. Paul's dates instead of trusting one.