Frost Dates for 54725 — Boyceville, Wisconsin

Half of springs at Ridgeland 1NNE, WI see their last 32°F night by May 10; 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 20 20%, and after May 26 10%. The 16 days between the even-odds date and the one-in-ten date is wider than at 70% of the 182 Wisconsin 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 13 one year in ten, and holds off past October 12 one year in ten. A hard freeze of 28°F follows 10 days later, around October 9; in spring the one-in-ten date for 28°F is May 14, 12 days before the 32°F one. The freeze-free season lasts 140 days in a typical year, shorter than at 85% of the 182 Wisconsin stations; it reaches 160 days one year in ten and falls short of 120 one year in ten. On average 176 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 21, and return around September 20. Severe cold of 16°F or below comes every winter, usually between November 11 and April 1.

July is the warmest month at Ridgeland 1NNE, WI, averaging 80°F by day and 58°F at night; January is the coldest at 21°F and 2°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 2,160 growing degree days a year (base 50°F), fewer than at 79% of the 182 Wisconsin stations. 33% of them (710) have built up by the end of June, and July adds the most, 594. Precipitation totals 35.5 inches a year, most in June (4.7") and least in January (1.0"); May to September bring 61% of it.

The nearest other station, Menomonie, WI, 14 miles south of Boyceville and 300 feet lower, has a last frost 1 day earlier (May 9), a first frost 2 days later (October 1), a season 3 days longer.

The first measurable snow (0.1 inch or more) in Boyceville usually arrives around November 13, and the last of the season around April 8. Those are the middle dates across the winters of 1991–2020 at Ridgeland 1NNE, WI, 12.5 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 32 days after the last snow.

ZIP 54725 is 13 miles from Ridgeland 1NNE, WI, which stands at 1,080 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 54725 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.