Carlock, IL 61725 Frost Dates
61725, near Carlock, IL: the frost window
The last spring frost here typically falls around 04/21, about 236 days from today. Fall's first freeze usually shows up around 10/17, roughly 178 days after the last spring frost.
Zone 5b (-15 to -10°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 Carlock, not a forecast for this year.
Stretching the season past the first frost
Carlock's growing season runs out in roughly 7 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
04/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/07 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/07 and only about 1 year in 10 sees frost after that.
Carlock against the rest of the dataset
About 178 days separate Carlock's last and first frost, putting it 25,866 of 40,283 ZIP codes nationally. Within IL, it ranks 1,099 of 1,548.
Learn more
Two guides worth reading on 61725: local microclimates, on what one yard in Carlock can differ from the 61725 normal, and zone vs. frost date, on why Zone 5b and Carlock's frost date answer different questions.