Chisholm, MN 55719 Frost Dates
Chisholm, MN: when does the frost end?
Typically, the last spring freeze lands around 06/05, roughly 281 days out. Fall's first freeze usually shows up around 09/08, roughly 93 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Chisholm in Zone 3b (-35 to -30°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 2 weeks until Chisholm's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Chisholm's last frost
06/05 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/22 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/25 and only about 1 year in 10 sees frost after that.
Chisholm against the rest of the dataset
Chisholm's growing season runs about 93 days, ranking 39,868 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 926 of 943.
Learn more
Before leaning on 55719's figures: zone vs. frost date explains why Zone 3b and Chisholm's frost date answer different questions, while the frost range explains how to read the range around Chisholm's dates instead of trusting one.