Frost Dates for 54859 — Minong, Wisconsin

Half of springs at Minong 5 WSW, WI see their last 32°F night by May 10; only one in ten is past it by April 29, 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 21 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 October 4 in half of years, as early as September 21 one year in ten, and holds off past October 20 one year in ten. A hard freeze of 28°F follows 14 days later, around October 18; in spring the one-in-ten date for 28°F is May 16, 10 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 165 days one year in ten and falls short of 124 one year in ten. On average 175 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 22, and return around September 24. Severe cold of 16°F or below comes every winter, usually between November 13 and April 5.

July is the warmest month at Minong 5 WSW, WI, averaging 80°F by day and 59°F at night; January is the coldest at 22°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 2,205 growing degree days a year (base 50°F), fewer than at 75% of the 182 Wisconsin stations. 32% of them (704) have built up by the end of June, and July adds the most, 598.

The nearest other station, Solon Springs, WI, 16 miles north of Minong, has a last frost 2 days later (May 12), a first frost 2 days earlier (October 2), a season 2 days shorter.

The first measurable snow (0.1 inch or more) in Minong usually arrives around October 29, and the last of the season around April 17. Those are the middle dates across the winters of 1991–2020 at Gordon, WI, 8.3 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 23 days after the last snow.

ZIP 54859 is 4 miles from Minong 5 WSW, WI, which stands at 1,075 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 54859 in zone 4a, the band where the coldest night of the year averaged -30 to -25°F (-34.4 to -31.7°C) over 1991–2020; a zone describes winter lows, not frost dates.