Dilworth, MN 56529 Frost Dates
Dilworth, MN: when does the frost end?
Around 05/05 is the usual last spring frost, about 250 days away. 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 Dilworth 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 Dilworth's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/05 isn't a guarantee
05/05 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/20 and only about 1 year in 10 sees frost after that.
Dilworth against the rest of the dataset
Dilworth's growing season runs about 150 days, ranking 35,279 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 516 of 943.
Learn more
Before leaning on 56529's figures: the frost range explains how to read the range around Dilworth's dates instead of trusting one, while local microclimates explains what one yard in Dilworth can differ from the 56529 normal.