Frost Dates for 55783 — Sturgeon Lake, Minnesota

Half of springs at Moose Lake 1 SSE, MN see their last 32°F night by May 12; only one in ten is past it by April 28, and one in ten still has one after May 26. Planting tender crops after May 17 leaves a 30% risk of a frost on them, after May 21 20%, and after May 26 10%. The 14 days between the even-odds date and the one-in-ten date is narrower than at 37% of the 142 Minnesota stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 2 in half of years, as early as September 20 one year in ten, and holds off past October 17 one year in ten. A hard freeze of 28°F follows 12 days later, around October 14; in spring the one-in-ten date for 28°F is May 13, 13 days before the 32°F one. The freeze-free season lasts 144 days in a typical year, shorter than at 67% of the 142 Minnesota stations; it reaches 161 days one year in ten and falls short of 123 one year in ten. On average 175 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 23. Severe cold of 16°F or below comes every winter, usually between November 12 and April 2.

July is the warmest month at Moose Lake 1 SSE, MN, averaging 80°F by day and 57°F at night; January is the coldest at 20°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 83% of years.

Warmth for growing adds up to 2,012 growing degree days a year (base 50°F), fewer than at 80% of the 142 Minnesota stations. 28% of them (573) have built up by the end of June, and July adds the most, 581. Precipitation totals 31.6 inches a year, most in June (4.8") and least in January (0.8"); May to September bring 63% of it.

The nearest other station, Sandstone 6 W, MN, 20 miles southwest of Sturgeon Lake, has a last frost 1 day later (May 13), a first frost 3 days earlier (September 29), a season 7 days shorter.

The first measurable snow (0.1 inch or more) in Sturgeon Lake usually arrives around November 8, and the last of the season around April 16. Those are the middle dates across the winters of 1991–2020 at Moose Lake 1 SSE, MN, 5.2 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 26 days after the last snow.

ZIP 55783 is 5 miles from Moose Lake 1 SSE, MN, which stands at 1,110 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station; its figures are presented in full for 55767 (Moose Lake). The 2023 USDA Plant Hardiness Zone Map lists ZIP 55783 in zone 4a, the band where the coldest night of the year averaged -30 to -25°F (-34.4 to -31.7°C) over 1991–2020; a zone describes winter lows, not frost dates.