Northbrook, IL 60082 Frost Dates
60082, near Northbrook, IL: the frost window
The last spring frost here typically falls around 04/26, about 241 days from today. Fall's first freeze usually shows up around 10/21, roughly 176 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Northbrook 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
Northbrook'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.
How much risk comes with planting early here
04/26 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.
Northbrook against the rest of the dataset
About 176 days separate Northbrook's last and first frost, putting it 26,377 of 40,283 ZIP codes nationally. Within IL, it ranks 1,156 of 1,548.
Learn more
Two guides worth reading on 60082: zone vs. frost date, on why Zone 6a and Northbrook's frost date answer different questions, and the frost range, on how to read the range around Northbrook's dates instead of trusting one.