Frost Dates for 56220 — Canby, Minnesota

Half of springs at Canby, MN see their last 32°F night by May 2; only one in ten is past it by April 20, and one in ten still has one after May 14. Planting tender crops after May 7 leaves a 30% risk of a frost on them, after May 10 20%, and after May 14 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 October 5 in half of years, as early as September 23 one year in ten, and holds off past October 19 one year in ten. A hard freeze of 28°F follows 12 days later, around October 17; in spring the one-in-ten date for 28°F is May 6, 8 days before the 32°F one. The freeze-free season lasts 156 days in a typical year, longer than at 67% of the 142 Minnesota stations; it reaches 175 days one year in ten and falls short of 138 one year in ten. On average 163 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 11, and return around September 28. Severe cold of 16°F or below comes every winter, usually between November 12 and March 29.

July is the warmest month at Canby, MN, averaging 83°F by day and 62°F at night; January is the coldest at 23°F and 5°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 57% of years.

Warmth for growing adds up to 2,626 growing degree days a year (base 50°F), more than at 73% of the 142 Minnesota stations. 33% of them (856) have built up by the end of June, and July adds the most, 690. Precipitation totals 27.9 inches a year, most in June (4.1") and least in January (0.8"); May to September bring 61% of it.

The nearest other station, Madison Wwtp, MN, 20 miles north of Canby, has a last frost 1 day later (May 3), a first frost 3 days earlier (October 2), a season 5 days shorter.

The first measurable snow (0.1 inch or more) in Canby usually arrives around November 11, and the last of the season around April 12. Those are the middle dates across the winters of 1991–2020 at Canby, MN, 1.2 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 20 days after the last snow.

ZIP 56220 is 1 mile from Canby, MN, which stands at 1,210 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 56220 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.