St. Paul, MN 55101 Frost Dates
St. Paul, MN: when does the frost end?
The last spring frost here typically falls around 04/24, about 239 days from today. Fall's first freeze usually shows up around 10/16, roughly 174 days after the last spring frost.
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.
Stretching the season past the first frost
With roughly 7 weeks until St. Paul's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around St. Paul's last frost
04/24 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/10 and only about 1 year in 10 sees frost after that.
St. Paul against the rest of the dataset
St. Paul's growing season runs about 174 days, ranking 27,304 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 62 of 943.
Learn more
Before leaning on 55101's figures: local microclimates explains what one yard in St. Paul can differ from the 55101 normal, while zone vs. frost date explains why Zone 5a and St. Paul's frost date answer different questions.