St. Paul, MN 55130 Frost Dates
St. Paul, MN: when does the frost end?
Around 04/24 is the usual last spring frost, about 239 days away. 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.
How much risk comes with planting early here
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
At roughly 174 frost-free days, St. Paul places 27,306 of 40,283 ZIP codes in this dataset. Within MN, it ranks 64 of 943.
Learn more
Before leaning on 55130's figures: local microclimates explains what one yard in St. Paul can differ from the 55130 normal, while zone vs. frost date explains why Zone 5a and St. Paul's frost date answer different questions.