Pontoosuc, IL 62358 Frost Dates
62358, near Pontoosuc, IL: the frost window
The last spring frost here typically falls around 04/12, about 227 days from today. Fall's first freeze usually shows up around 10/25, roughly 194 days after the last spring frost.
Pontoosuc 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
Pontoosuc'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 Pontoosuc's last frost
04/12 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/01 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/26 and only about 1 year in 10 sees frost after that.
Pontoosuc against the rest of the dataset
At roughly 194 frost-free days, Pontoosuc places 19,656 of 40,283 ZIP codes in this dataset. Within IL, it ranks 367 of 1,548.
Learn more
Two guides worth reading on 62358: the frost range, on how to read the range around Pontoosuc's dates instead of trusting one, and local microclimates, on what one yard in Pontoosuc can differ from the 62358 normal.