Cooksville, IL 61730 Frost Dates
Cooksville, IL: when does the frost end?
Typically, the last spring freeze lands around 04/25, roughly 240 days out. Fall's first freeze usually shows up around 10/16, roughly 172 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Cooksville 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
With roughly 7 weeks until Cooksville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Cooksville's last frost
04/25 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/11 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/11 and only about 1 year in 10 sees frost after that.
Cooksville against the rest of the dataset
About 172 days separate Cooksville's last and first frost, putting it 28,527 of 40,283 ZIP codes nationally. Within IL, it ranks 1,361 of 1,548.
Learn more
Before leaning on 61730's figures: the frost range explains how to read the range around Cooksville's dates instead of trusting one, while local microclimates explains what one yard in Cooksville can differ from the 61730 normal.