Oak Forest, IL 60452 Frost Dates
60452, near Oak Forest, IL: the frost window
The last spring frost here typically falls around 04/23, about 238 days from today. Fall's first freeze usually shows up around 10/20, roughly 179 days after the last spring frost.
Oak Forest sits in USDA Zone 6a (-10 to -5°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
Oak Forest'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.
The actual range around Oak Forest's last frost
04/23 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/09 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.
Oak Forest against the rest of the dataset
About 179 days separate Oak Forest's last and first frost, putting it 25,186 of 40,283 ZIP codes nationally. Within IL, it ranks 992 of 1,548.
Learn more
Two guides worth reading on 60452: zone vs. frost date, on why Zone 6a and Oak Forest's frost date answer different questions, and the frost range, on how to read the range around Oak Forest's dates instead of trusting one.