St. Francis, WI 53274 Frost Dates
53274, 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.
St. Francis sits in USDA Zone 6a (-10 to -5°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
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.
The actual range around St. Francis's last frost
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
St. Francis's growing season runs about 184 days, ranking 23,480 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 18 of 860.
Learn more
Two guides worth reading on 53274: the frost range, on how to read the range around St. Francis's dates instead of trusting one, and local microclimates, on what one yard in St. Francis can differ from the 53274 normal.