Frost Dates for 56763 — Warroad, Minnesota

Half of springs at Warroad, MN see their last 32°F night by May 16; only one in ten is past it by May 5, and one in ten still has one after May 30. Planting tender crops after May 23 leaves a 30% risk of a frost on them, after May 26 20%, and after May 30 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 September 24 in half of years, as early as September 11 one year in ten, and holds off past October 6 one year in ten. A hard freeze of 28°F follows 9 days later, around October 3; in spring the one-in-ten date for 28°F is May 22, 8 days before the 32°F one. The freeze-free season lasts 129 days in a typical year, shorter than at 94% of the 142 Minnesota stations; it reaches 147 days one year in ten and falls short of 109 one year in ten. On average 191 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 11 days longer, to about May 27, and return around September 14. Severe cold of 16°F or below comes every winter, usually between November 4 and April 14.

July is the warmest month at Warroad, MN, averaging 77°F by day and 55°F at night; January is the coldest at 13°F and -8°F. A freezing night is all but certain in every month from October to May (a 90% chance or more). From June to August the chance of a 32°F night stays under 10% each month.

Warmth for growing adds up to 1,621 growing degree days a year (base 50°F), fewer than at 96% of the 142 Minnesota stations. 30% of them (490) have built up by the end of June, and July adds the most, 488. Precipitation totals 27.8 inches a year, most in June (4.8") and least in February (0.6"); May to September bring 69% of it.

The nearest other station, Baudette, MN, 36 miles east of Warroad, has a last frost 2 days earlier (May 14), a first frost 2 days later (September 26), a season 6 days longer.

The first measurable snow (0.1 inch or more) in Warroad usually arrives around November 4, and the last of the season around March 25. Those are the middle dates across the winters of 1991–2020 at Warroad, MN, 0.4 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 52 days after the last snow.

ZIP 56763 is under a mile from Warroad, MN, which stands at 1,073 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station; its figures are presented in full for 56751 (Roseau). The 2023 USDA Plant Hardiness Zone Map lists ZIP 56763 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.