Frost Dates for 55741 — Gilbert, Minnesota

Half of springs at Eveleth Wwtp, MN see their last 32°F night by May 12; only one in ten is past it by April 30, and one in ten still has one after May 28. Planting tender crops after May 19 leaves a 30% risk of a frost on them, after May 23 20%, and after May 28 10%. The 16 days between the even-odds date and the one-in-ten date is wider than at 77% of the 142 Minnesota stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 1 in half of years, as early as September 18 one year in ten, and holds off past October 14 one year in ten. A hard freeze of 28°F follows 12 days later, around October 13; in spring the one-in-ten date for 28°F is May 16, 12 days before the 32°F one. The freeze-free season lasts 141 days in a typical year, shorter than at 75% of the 142 Minnesota stations; it reaches 159 days one year in ten and falls short of 122 one year in ten. On average 189 nights a year drop to 32°F or below. Nights of 36°F, when frost can still settle on leaves in low, open spots, continue 12 days longer, to about May 24, and return around September 22. Severe cold of 16°F or below comes every winter, usually between November 10 and April 6.

July is the warmest month at Eveleth Wwtp, MN, averaging 77°F by day and 56°F at night; January is the coldest at 17°F and -1°F. A freezing night is all but certain in every month from October to April (a 90% chance or more). From June to August the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 89% of years.

Warmth for growing adds up to 1,723 growing degree days a year (base 50°F), fewer than at 90% of the 142 Minnesota stations. 30% of them (517) have built up by the end of June, and July adds the most, 508. Precipitation totals 27.8 inches a year, most in June (4.3") and least in February (0.7"); May to September bring 65% of it.

The nearest other station, Hibbing Chisholm Hibbing Airport, MN, 21 miles west of Gilbert, has a last frost 24 days later (June 5), a first frost 23 days earlier (September 8), a season 48 days shorter.

The first measurable snow (0.1 inch or more) in Gilbert usually arrives around November 9, and the last of the season around April 2. Those are the middle dates across the winters of 1991–2020 at Eveleth Wwtp, MN, 5.9 miles away: half of years saw snow earlier, half later. Every one of those winters saw snow. The last 32°F night of spring typically comes 40 days after the last snow.

ZIP 55741 is 6 miles from Eveleth Wwtp, MN, which stands at 1,445 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 4 other ZIP codes share the station; its figures are presented in full for 55792 (Virginia). The 2023 USDA Plant Hardiness Zone Map lists ZIP 55741 in zone 3b, the band where the coldest night of the year averaged -35 to -30°F (-37.2 to -34.4°C) over 1991–2020; a zone describes winter lows, not frost dates.