Harris, MN 55032 Frost Dates
Harris, MN: when does the frost end?
The last spring frost here typically falls around 05/02, about 247 days from today. Fall's first freeze usually shows up around 10/04, roughly 153 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Harris in Zone 4b (-25 to -20°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 5 weeks until Harris's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/02 isn't a guarantee
05/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/20 and only about 1 year in 10 sees frost after that.
Harris against the rest of the dataset
At roughly 153 frost-free days, Harris places 34,565 of 40,283 ZIP codes in this dataset. Within MN, it ranks 417 of 943.
Learn more
Before leaning on 55032's figures: local microclimates explains what one yard in Harris can differ from the 55032 normal, while zone vs. frost date explains why Zone 4b and Harris's frost date answer different questions.