Hatley, WI 54440 Frost Dates
Frost dates for Hatley, WI, ZIP 54440
The last spring frost here typically falls around 05/06, about 251 days from today. The first fall frost typically arrives around 10/05, about 150 frost-free days later.
Hatley sits in USDA Zone 4b (-25 to -20°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
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.
The actual range around Hatley's last frost
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
About 150 days separate Hatley's last and first frost, putting it 35,364 of 40,283 ZIP codes nationally. Within WI, it ranks 579 of 860.
Learn more
local microclimates explains what one yard in Hatley can differ from the 54440 normal, and zone vs. frost date explains why Zone 4b and Hatley's frost date answer different questions.