Norwalk, WI 54648 Frost Dates
Norwalk, WI: when does the frost end?
The last spring frost here typically falls around 05/06, about 251 days from today. Fall's first freeze usually shows up around 10/03, roughly 150 days after the last spring frost.
Norwalk sits in USDA Zone 5a (-20 to -15°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 5 weeks until Norwalk's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Norwalk's last frost
05/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/22 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/20 and only about 1 year in 10 sees frost after that.
Norwalk against the rest of the dataset
About 150 days separate Norwalk's last and first frost, putting it 35,368 of 40,283 ZIP codes nationally. Within WI, it ranks 581 of 860.
Learn more
Before leaning on 54648's figures: local microclimates explains what one yard in Norwalk can differ from the 54648 normal, while zone vs. frost date explains why Zone 5a and Norwalk's frost date answer different questions.