Gilman, MN 56333 Frost Dates
Gilman, MN: when does the frost end?
Around 05/10 is the usual last spring frost, about 255 days away. Fall's first freeze usually shows up around 09/29, roughly 140 days after the last spring frost.
Gilman sits in USDA Zone 4a (-30 to -25°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 5 weeks until Gilman's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/22 and only about 1 year in 10 sees frost after that.
Gilman against the rest of the dataset
Gilman's growing season runs about 140 days, ranking 37,172 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 751 of 943.
Learn more
Before leaning on 56333's figures: local microclimates explains what one yard in Gilman can differ from the 56333 normal, while zone vs. frost date explains why Zone 4a and Gilman's frost date answer different questions.