West Allis, WI 53214 Frost Dates
Frost dates for West Allis, WI, ZIP 53214
Typically, the last spring freeze lands around 04/26, roughly 241 days out. The first fall frost typically arrives around 10/22, about 177 frost-free days later.
The USDA Plant Hardiness Zone Map puts West Allis in Zone 5b (-15 to -10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 5b around West Allis has about 8 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.
Why 04/26 isn't a guarantee
04/26 is the middle of 30 years of NOAA records, not a promise. Plant by 04/12 and you're betting against frost in roughly 9 years out of 10. 05/12 is the safer bet, historically only a 1-in-10 chance of frost that late.
How West Allis compares
At roughly 177 frost-free days, West Allis places 25,993 of 40,283 ZIP codes in this dataset. Within WI, it ranks 70 of 860.
Learn more
local microclimates explains what one yard in West Allis can differ from the 53214 normal, and zone vs. frost date explains why Zone 5b and West Allis's frost date answer different questions.