Hatley, WI 54471 Frost Dates
Frost dates for Hatley, WI, ZIP 54471
Typically, the last spring freeze lands around 05/06, roughly 251 days out. The first fall frost typically arrives around 10/04, about 150 frost-free days later.
The USDA Plant Hardiness Zone Map puts Hatley in Zone 4b (-25 to -20°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 4b around Hatley 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.
Why 05/06 isn't a guarantee
05/06 is the middle of 30 years of NOAA records, not a promise. Plant by 04/24 and you're betting against frost in roughly 9 years out of 10. 05/21 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Hatley compares
At roughly 150 frost-free days, Hatley places 35,365 of 40,283 ZIP codes in this dataset. Within WI, it ranks 580 of 860.
Learn more
the frost range explains how to read the range around Hatley's dates instead of trusting one, and local microclimates explains what one yard in Hatley can differ from the 54471 normal.