Frost Dates for 56377 — Sartell, Minnesota

Half of springs at Rice, MN see their last 32°F night by May 10; only one in ten is past it by April 30, and one in ten still has one after May 22. Planting tender crops after May 15 leaves a 30% risk of a frost on them, after May 18 20%, and after May 22 10%. The 12 days between the even-odds date and the one-in-ten date is narrower than at 85% of the 142 Minnesota stations behind this site's ZIP pages.

In fall the first 32°F night comes by September 29 in half of years, as early as September 15 one year in ten, and holds off past October 12 one year in ten. A hard freeze of 28°F follows 8 days later, around October 7; in spring the one-in-ten date for 28°F is May 12, 10 days before the 32°F one. The freeze-free season lasts 140 days in a typical year, shorter than at 78% of the 142 Minnesota stations; it reaches 159 days one year in ten and falls short of 122 one year in ten. On average 180 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 9 days longer, to about May 19, and return around September 21. Severe cold of 16°F or below comes every winter, usually between November 6 and April 6.

July is the warmest month at Rice, MN, averaging 80°F by day and 58°F at night; January is the coldest at 20°F and 0°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 88% of years.

Warmth for growing adds up to 2,144 growing degree days a year (base 50°F), fewer than at 70% of the 142 Minnesota stations. 32% of them (678) have built up by the end of June, and July adds the most, 595.

The nearest other station, Collegeville St John'S, MN, 9 miles west of Sartell and 150 feet higher, has a last frost 7 days earlier (May 3), a first frost 8 days later (October 7), a season 15 days longer.

The first measurable snow (0.1 inch or more) in Sartell usually arrives around November 9, and the last of the season around April 14. Those are the middle dates across the winters of 1991–2020 at Collegeville St John'S, MN, 9.3 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 56377 is 9 miles from Rice, MN, which stands at 1,060 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 3 other ZIP codes share the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 56377 in zone 4b, the band where the coldest night of the year averaged -25 to -20°F (-31.7 to -28.9°C) over 1991–2020; a zone describes winter lows, not frost dates.