St. Francis, WI 53235 Frost Dates
Frost dates for St. Francis, WI, ZIP 53235
Typically, the last spring freeze lands around 04/19, roughly 234 days out. The first fall frost typically arrives around 10/29, about 192 frost-free days later.
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.
What to do before the first frost
Zone 6a around St. Francis has about 9 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
04/19 is the middle of 30 years of NOAA records, not a promise. Plant by 04/06 and you're betting against frost in roughly 9 years out of 10. 05/02 is the safer bet, historically only a 1-in-10 chance of frost that late.
How St. Francis compares
At roughly 192 frost-free days, St. Francis places 20,232 of 40,283 ZIP codes in this dataset. Within WI, it ranks 4 of 860.
Learn more
the frost range explains how to read the range around St. Francis's dates instead of trusting one, and local microclimates explains what one yard in St. Francis can differ from the 53235 normal.