Frost Dates for 54552 — Park Falls, Wisconsin

Half of springs at Park Falls Dnr Hq, WI see their last 32°F night by May 15; only one in ten is past it by April 30, and one in ten still has one after May 30. Planting tender crops after May 21 leaves a 30% risk of a frost on them, after May 25 20%, and after May 30 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 September 28 in half of years, as early as September 16 one year in ten, and holds off past October 11 one year in ten. A hard freeze of 28°F follows 9 days later, around October 7; in spring the one-in-ten date for 28°F is May 19, 11 days before the 32°F one. The freeze-free season lasts 134 days in a typical year, shorter than at 92% of the 182 Wisconsin stations; it reaches 154 days one year in ten and falls short of 114 one year in ten. On average 185 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 13 days longer, to about May 28, and return around September 19. Severe cold of 16°F or below comes every winter, usually between November 10 and April 7.

July is the warmest month at Park Falls Dnr Hq, WI, averaging 78°F by day and 56°F at night; January is the coldest at 20°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 89% of years.

Warmth for growing adds up to 1,887 growing degree days a year (base 50°F), fewer than at 91% of the 182 Wisconsin stations. 32% of them (605) have built up by the end of June, and July adds the most, 522. Precipitation totals 34.0 inches a year, most in June (4.4") and least in February (1.1"); May to September bring 59% of it.

The nearest other station, Prentice #2, WI, 27 miles south of Park Falls, has a last frost 8 days later (May 23), a first frost 5 days earlier (September 23), a season 10 days shorter.

The first measurable snow (0.1 inch or more) in Park Falls usually arrives around November 12, and the last of the season around April 15. Those are the middle dates across the winters of 1991–2020 at Park Falls Dnr Hq, WI, 5.2 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 54552 is 5 miles from Park Falls Dnr Hq, WI, which stands at 1,525 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 54552 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.