Jackson, MN 56143 Frost Dates
Jackson, MN: when does the frost end?
Around 05/02 is the usual last spring frost, about 247 days away. Fall's first freeze usually shows up around 10/02, roughly 153 days after the last spring frost.
Jackson sits in USDA Zone 5a (-20 to -15°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 5 weeks until Jackson'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 04/18 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/13 and only about 1 year in 10 sees frost after that.
Jackson against the rest of the dataset
About 153 days separate Jackson's last and first frost, putting it 34,538 of 40,283 ZIP codes nationally. Within MN, it ranks 410 of 943.
Learn more
Before leaning on 56143's figures: the frost range explains how to read the range around Jackson's dates instead of trusting one, while local microclimates explains what one yard in Jackson can differ from the 56143 normal.