Grandview, IL 62708 Frost Dates
62708, near Grandview, IL: the frost window
Typically, the last spring freeze lands around 04/14, roughly 229 days out. Fall's first freeze usually shows up around 10/20, roughly 187 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Grandview in Zone 6a (-10 to -5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Grandview'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 04/14 isn't a guarantee
04/14 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 04/29 and only about 1 year in 10 sees frost after that.
Grandview against the rest of the dataset
Grandview's growing season runs about 187 days, ranking 22,477 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 759 of 1,548.
Learn more
Two guides worth reading on 62708: local microclimates, on what one yard in Grandview can differ from the 62708 normal, and zone vs. frost date, on why Zone 6a and Grandview's frost date answer different questions.