Kewaskum, WI 53040 Frost Dates
Frost dates for Kewaskum, WI, ZIP 53040
Around 05/01 is the usual last spring frost, about 246 days away. The first fall frost typically arrives around 10/12, about 161 frost-free days later.
Kewaskum sits in USDA Zone 5b (-15 to -10°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 5b around Kewaskum has about 6 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Kewaskum's last frost
05/01 is the middle of 30 years of NOAA records, not a promise. Plant by 04/19 and you're betting against frost in roughly 9 years out of 10. 05/18 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Kewaskum compares
Kewaskum's growing season runs about 161 days, ranking 32,028 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 322 of 860.
Learn more
zone vs. frost date explains why Zone 5b and Kewaskum's frost date answer different questions, and the frost range explains how to read the range around Kewaskum's dates instead of trusting one.