Hales Corners, WI 53130 Frost Dates
When can you plant in Hales Corners, WI?
Around 05/03 is the usual last spring frost, about 248 days away. The first fall frost typically arrives around 10/14, about 162 frost-free days later.
Zone 5b (-15 to -10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Hales Corners, not a forecast for this year.
What to do before the first frost
About 7 weeks of growing season left in Hales Corners before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
05/03 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. 05/19 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Hales Corners compares
About 162 days separate Hales Corners's last and first frost, putting it 31,704 of 40,283 ZIP codes nationally. Within WI, it ranks 263 of 860.
Learn more
zone vs. frost date covers why Zone 5b and Hales Corners's frost date answer different questions. the frost range covers how to read the range around Hales Corners's dates instead of trusting one.