Biggsville, IL 61418 Frost Dates
61418, near Biggsville, IL: the frost window
The last spring frost here typically falls around 04/08, about 223 days from today. Fall's first freeze usually shows up around 10/29, roughly 202 days after the last spring frost.
Biggsville sits in USDA Zone 5b (-15 to -10°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
Biggsville's growing season runs out in roughly 9 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/08 isn't a guarantee
04/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/26 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/23 and only about 1 year in 10 sees frost after that.
Biggsville against the rest of the dataset
At roughly 202 frost-free days, Biggsville places 17,354 of 40,283 ZIP codes in this dataset. Within IL, it ranks 191 of 1,548.
Learn more
Two guides worth reading on 61418: the frost range, on how to read the range around Biggsville's dates instead of trusting one, and local microclimates, on what one yard in Biggsville can differ from the 61418 normal.