Bagley, MN 56621 Frost Dates
Bagley, MN: when does the frost end?
The last spring frost here typically falls around 05/15, about 260 days from today. Fall's first freeze usually shows up around 09/26, roughly 132 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Bagley 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 4 weeks until Bagley's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/15 isn't a guarantee
05/15 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/30 and only about 1 year in 10 sees frost after that.
Bagley against the rest of the dataset
At roughly 132 frost-free days, Bagley places 38,206 of 40,283 ZIP codes in this dataset. Within MN, it ranks 825 of 943.
Learn more
Before leaning on 56621's figures: local microclimates explains what one yard in Bagley can differ from the 56621 normal, while zone vs. frost date explains why Zone 3b and Bagley's frost date answer different questions.