St. Francis, WI 53234 Frost Dates
53234, near St. Francis, WI: the frost window
Typically, the last spring freeze lands around 04/22, roughly 237 days out. Fall's first freeze usually shows up around 10/26, roughly 184 days after the last spring frost.
Zone 6a (-10 to -5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for St. Francis, not a forecast for this year.
Stretching the season past the first frost
St. Francis's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/22 isn't a guarantee
04/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/08 and only about 1 year in 10 sees frost after that.
St. Francis against the rest of the dataset
About 184 days separate St. Francis's last and first frost, putting it 23,478 of 40,283 ZIP codes nationally. Within WI, it ranks 16 of 860.
Learn more
Two guides worth reading on 53234: local microclimates, on what one yard in St. Francis can differ from the 53234 normal, and zone vs. frost date, on why Zone 6a and St. Francis's frost date answer different questions.