Belleville, IL 62220 Frost Dates
Belleville, IL: when does the frost end?
Typically, the last spring freeze lands around 04/12, roughly 227 days out. Fall's first freeze usually shows up around 10/20, roughly 189 days after the last spring frost.
Belleville sits in USDA Zone 7a (0 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
With roughly 8 weeks until Belleville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Belleville's last frost
04/12 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/28 and only about 1 year in 10 sees frost after that.
Belleville against the rest of the dataset
Belleville's growing season runs about 189 days, ranking 21,404 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 567 of 1,548.
Learn more
Before leaning on 62220's figures: the frost range explains how to read the range around Belleville's dates instead of trusting one, while local microclimates explains what one yard in Belleville can differ from the 62220 normal.