Chisago City, MN 55013 Frost Dates
Chisago City, MN: when does the frost end?
Around 05/03 is the usual last spring frost, about 248 days away. Fall's first freeze usually shows up around 10/05, roughly 154 days after the last spring frost.
Zone 4b (-25 to -20°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Chisago City, not a forecast for this year.
Stretching the season past the first frost
With roughly 5 weeks until Chisago City's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/03 isn't a guarantee
05/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/20 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/19 and only about 1 year in 10 sees frost after that.
Chisago City against the rest of the dataset
About 154 days separate Chisago City's last and first frost, putting it 34,263 of 40,283 ZIP codes nationally. Within MN, it ranks 387 of 943.
Learn more
Before leaning on 55013's figures: the frost range explains how to read the range around Chisago City's dates instead of trusting one, while local microclimates explains what one yard in Chisago City can differ from the 55013 normal.