Westfield, WI 53964 Frost Dates
Frost dates for Westfield, WI, ZIP 53964
Typically, the last spring freeze lands around 05/03, roughly 248 days out. The first fall frost typically arrives around 10/05, about 153 frost-free days later.
The USDA Plant Hardiness Zone Map puts Westfield in Zone 5a (-20 to -15°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 5a around Westfield has about 5 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.
How much risk comes with planting early here
05/03 is the middle of 30 years of NOAA records, not a promise. Plant by 04/21 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 Westfield compares
At roughly 153 frost-free days, Westfield places 34,562 of 40,283 ZIP codes in this dataset. Within WI, it ranks 508 of 860.
Learn more
the frost range explains how to read the range around Westfield's dates instead of trusting one, and local microclimates explains what one yard in Westfield can differ from the 53964 normal.