Hayward, WI 54875 Frost Dates
Hayward, WI: when does the frost end?
Typically, the last spring freeze lands around 05/22, roughly 267 days out. Fall's first freeze usually shows up around 09/23, roughly 124 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Hayward in Zone 4a (-30 to -25°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 4 weeks until Hayward's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Hayward's last frost
05/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/06 and only about 1 year in 10 sees frost after that.
Hayward against the rest of the dataset
At roughly 124 frost-free days, Hayward places 38,836 of 40,283 ZIP codes in this dataset. Within WI, it ranks 825 of 860.
Learn more
Before leaning on 54875's figures: local microclimates explains what one yard in Hayward can differ from the 54875 normal, while zone vs. frost date explains why Zone 4a and Hayward's frost date answer different questions.