Whitewater, WI 53190 Frost Dates
When can you plant in Whitewater, WI?
Typically, the last spring freeze lands around 05/02, roughly 247 days out. The first fall frost typically arrives around 10/09, about 157 frost-free days later.
Whitewater 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
About 6 weeks of growing season left in Whitewater before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Whitewater's last frost
05/02 is the middle of 30 years of NOAA records, not a promise. Plant by 04/18 and you're betting against frost in roughly 9 years out of 10. 05/20 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Whitewater compares
Whitewater's growing season runs about 157 days, ranking 33,257 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 385 of 860.
Learn more
zone vs. frost date covers why Zone 5b and Whitewater's frost date answer different questions. the frost range covers how to read the range around Whitewater's dates instead of trusting one.