Olympia Fields, IL 60461 Frost Dates
Olympia Fields, IL: when does the frost end?
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.
Zone 6a (-10 to -5°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 Olympia Fields, not a forecast for this year.
Stretching the season past the first frost
With roughly 8 weeks until Olympia Fields's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Olympia Fields'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.
Olympia Fields against the rest of the dataset
At roughly 179 frost-free days, Olympia Fields places 25,293 of 40,283 ZIP codes in this dataset. Within IL, it ranks 1,030 of 1,548.
Learn more
Before leaning on 60461's figures: local microclimates explains what one yard in Olympia Fields can differ from the 60461 normal, while zone vs. frost date explains why Zone 6a and Olympia Fields's frost date answer different questions.