East Troy, WI 53120 Frost Dates
East Troy, WI: when does the frost end?
The last spring frost here typically falls around 05/05, about 250 days from today. Fall's first freeze usually shows up around 10/10, roughly 156 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts East Troy in Zone 5b (-15 to -10°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 6 weeks until East Troy's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around East Troy's last frost
05/05 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/23 and only about 1 year in 10 sees frost after that.
East Troy against the rest of the dataset
About 156 days separate East Troy's last and first frost, putting it 33,574 of 40,283 ZIP codes nationally. Within WI, it ranks 417 of 860.
Learn more
Before leaning on 53120's figures: the frost range explains how to read the range around East Troy's dates instead of trusting one, while local microclimates explains what one yard in East Troy can differ from the 53120 normal.