Frost Dates for 54436 — Granton, Wisconsin

Half of springs at Neillsville 3ESE, WI see their last 32°F night by May 10; only one in ten is past it by April 26, and one in ten still has one after May 25. Planting tender crops after May 16 leaves a 30% risk of a frost on them, after May 19 20%, and after May 25 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 18 one year in ten, and holds off past October 14 one year in ten. A hard freeze of 28°F follows 9 days later, around October 10; in spring the one-in-ten date for 28°F is May 14, 11 days before the 32°F one. The freeze-free season lasts 144 days in a typical year, shorter than at 76% of the 182 Wisconsin stations; it reaches 161 days one year in ten and falls short of 123 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 10 days longer, to about May 20, and return around September 23. Severe cold of 16°F or below comes every winter, usually between November 14 and March 31.

July is the warmest month at Neillsville 3ESE, WI, averaging 80°F by day and 58°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 80% of years.

Warmth for growing adds up to 2,213 growing degree days a year (base 50°F), fewer than at 74% of the 182 Wisconsin stations. 33% of them (731) have built up by the end of June, and July adds the most, 589. Precipitation totals 35.6 inches a year, most in June (5.3") and least in January (1.1"); May to September bring 62% of it.

The nearest other station, Marshfield Municipal Airport, WI, 14 miles northeast of Granton and 175 feet higher, has a last frost 5 days earlier (May 5), a first frost 4 days later (October 5), a season 8 days longer.

The first measurable snow (0.1 inch or more) in Granton usually arrives around November 15, and the last of the season around April 11. Those are the middle dates across the winters of 1991–2020 at Neillsville 3ESE, WI, 4.6 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 29 days after the last snow.

ZIP 54436 is 5 miles from Neillsville 3ESE, WI, which stands at 1,080 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 54456 (Neillsville). The 2023 USDA Plant Hardiness Zone Map lists ZIP 54436 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.