Frost Dates for 54174 — Suring, Wisconsin

Half of springs at Suring, WI see their last 32°F night by May 14; only one in ten is past it by April 30, and one in ten still has one after May 29. Planting tender crops after May 21 leaves a 30% risk of a frost on them, after May 24 20%, and after May 29 10%. The 15 days between the even-odds date and the one-in-ten date is narrower than at 30% of the 182 Wisconsin stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 1 in half of years, as early as September 19 one year in ten, and holds off past October 14 one year in ten. A hard freeze of 28°F follows 12 days later, around October 13; in spring the one-in-ten date for 28°F is May 17, 12 days before the 32°F one. The freeze-free season lasts 139 days in a typical year, shorter than at 86% of the 182 Wisconsin stations; it reaches 158 days one year in ten and falls short of 121 one year in ten. On average 177 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 12 days longer, to about May 26, and return around September 21. Severe cold of 16°F or below comes every winter, usually between November 17 and April 1.

July is the warmest month at Suring, WI, averaging 79°F by day and 56°F at night; January is the coldest at 24°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 88% of years.

Warmth for growing adds up to 1,985 growing degree days a year (base 50°F), fewer than at 87% of the 182 Wisconsin stations. 31% of them (624) have built up by the end of June, and July adds the most, 546. Precipitation totals 32.0 inches a year, most in June (4.2") and least in February (1.1"); May to September bring 58% of it.

The nearest other station, Shawano 2SSW, WI, 23 miles southwest of Suring, has a last frost 5 days earlier (May 9), a first frost 1 day later (October 2), a season 5 days longer.

The first measurable snow (0.1 inch or more) in Suring usually arrives around November 14, and the last of the season around April 14. Those are the middle dates across the winters of 1991–2020 at Suring, WI, 3.6 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 30 days after the last snow.

ZIP 54174 is 4 miles from Suring, WI, which stands at 792 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 54124 (Gillett). The 2023 USDA Plant Hardiness Zone Map lists ZIP 54174 in zone 5a, the band where the coldest night of the year averaged -20 to -15°F (-28.9 to -26.1°C) over 1991–2020; a zone describes winter lows, not frost dates.