Lebanon, IL 62254 Frost Dates
62254, near Lebanon, 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 10/20, roughly 189 days after the last spring frost.
Zone 6b (-5 to 0°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 Lebanon, not a forecast for this year.
Stretching the season past the first frost
Lebanon'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 04/12 isn't a guarantee
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.
Lebanon against the rest of the dataset
At roughly 189 frost-free days, Lebanon places 21,556 of 40,283 ZIP codes in this dataset. Within IL, it ranks 590 of 1,548.
Learn more
Two guides worth reading on 62254: local microclimates, on what one yard in Lebanon can differ from the 62254 normal, and zone vs. frost date, on why Zone 6b and Lebanon's frost date answer different questions.