Frost Dates for 53080 — Saukville, Wisconsin

Half of springs at Saukville Wwtp, WI see their last 32°F night by May 5; only one in ten is past it by April 22, and one in ten still has one after May 19. Planting tender crops after May 10 leaves a 30% risk of a frost on them, after May 14 20%, and after May 19 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 11 in half of years, as early as September 29 one year in ten, and holds off past October 24 one year in ten. A hard freeze of 28°F follows 13 days later, around October 24; in spring the one-in-ten date for 28°F is May 5, 14 days before the 32°F one. The freeze-free season lasts 158 days in a typical year, longer than at 56% of the 182 Wisconsin stations; it reaches 174 days one year in ten and falls short of 139 one year in ten. On average 157 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 14 days longer, to about May 19, and return around October 3. Severe cold of 16°F or below comes every winter, usually between November 23 and March 22.

July is the warmest month at Saukville Wwtp, WI, averaging 79°F by day and 59°F at night; January is the coldest at 27°F and 12°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 65% of years.

Warmth for growing adds up to 2,139 growing degree days a year (base 50°F), fewer than at 80% of the 182 Wisconsin stations. 29% of them (614) have built up by the end of June, and July adds the most, 579. Precipitation totals 35.0 inches a year, most in June (4.3") and least in January (1.5"); May to September bring 53% of it.

The nearest other station, Port Washington, WI, 5 miles east of Saukville and 172 feet lower, has a last frost 8 days earlier (April 27), a first frost 11 days later (October 22), a season 18 days longer.

The first measurable snow (0.1 inch or more) in Saukville usually arrives around December 2, and the last of the season around March 25. Those are the middle dates across the winters of 1991–2020 at Port Washington, WI, 4.8 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 41 days after the last snow.

ZIP 53080 is 2 miles from Saukville Wwtp, WI, which stands at 766 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 53080 in zone 5b, the band where the coldest night of the year averaged -15 to -10°F (-26.1 to -23.3°C) over 1991–2020; a zone describes winter lows, not frost dates.