Frost Dates for 53910 — Adams, Wisconsin

Half of springs at Friendship, WI see their last 32°F night by May 9; only one in ten is past it by April 23, and one in ten still has one after May 23. Planting tender crops after May 15 leaves a 30% risk of a frost on them, after May 19 20%, and after May 23 10%. The 14 days between the even-odds date and the one-in-ten date is narrower than at 58% of the 182 Wisconsin stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 3 in half of years, as early as September 19 one year in ten, and holds off past October 16 one year in ten. A hard freeze of 28°F follows 10 days later, around October 13; in spring the one-in-ten date for 28°F is May 14, 9 days before the 32°F one. The freeze-free season lasts 147 days in a typical year, shorter than at 71% of the 182 Wisconsin stations; it reaches 166 days one year in ten and falls short of 127 one year in ten. On average 169 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 20, and return around September 24. Severe cold of 16°F or below comes every winter, usually between November 15 and March 30.

July is the warmest month at Friendship, WI, averaging 82°F by day and 59°F at night; January is the coldest at 25°F and 6°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 74% of years.

Warmth for growing adds up to 2,476 growing degree days a year (base 50°F), more than at 55% of the 182 Wisconsin stations. 33% of them (827) have built up by the end of June, and July adds the most, 643. Precipitation totals 35.1 inches a year, most in July (4.6") and least in January (1.3"); May to September bring 60% of it.

The nearest other station, Mauston 1 SE, WI, 15 miles southwest of Adams, has a last frost 7 days earlier (May 2), a first frost 4 days later (October 7), a season 11 days longer.

The first measurable snow (0.1 inch or more) in Adams usually arrives around November 18, and the last of the season around April 12. Those are the middle dates across the winters of 1991–2020 at Friendship, WI, 4.7 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 27 days after the last snow.

ZIP 53910 is 5 miles from Friendship, WI, which stands at 945 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 53934 (Friendship). The 2023 USDA Plant Hardiness Zone Map lists ZIP 53910 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.