Tomahawk, WI 54435 Frost Dates
Tomahawk, 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 09/24, roughly 125 days after the last spring frost.
Tomahawk 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.
Stretching the season past the first frost
With roughly 4 weeks until Tomahawk's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Tomahawk's last frost
05/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/04 and only about 1 year in 10 sees frost after that.
Tomahawk against the rest of the dataset
Tomahawk's growing season runs about 125 days, ranking 38,760 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 815 of 860.
Learn more
Before leaning on 54435's figures: local microclimates explains what one yard in Tomahawk can differ from the 54435 normal, while zone vs. frost date explains why Zone 4b and Tomahawk's frost date answer different questions.