Callaway, MN 56591 Frost Dates
Callaway, MN: when does the frost end?
The last spring frost here typically falls around 05/05, about 250 days from today. Fall's first freeze usually shows up around 10/03, roughly 150 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Callaway in Zone 4a (-30 to -25°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 Callaway's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Callaway's last frost
05/05 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/18 and only about 1 year in 10 sees frost after that.
Callaway against the rest of the dataset
About 150 days separate Callaway's last and first frost, putting it 35,435 of 40,283 ZIP codes nationally. Within MN, it ranks 550 of 943.
Learn more
Before leaning on 56591's figures: zone vs. frost date explains why Zone 4a and Callaway's frost date answer different questions, while the frost range explains how to read the range around Callaway's dates instead of trusting one.