Oak Lawn, IL 60453 Frost Dates
Oak Lawn, IL: when does the frost end?
Typically, the last spring freeze lands around 04/10, roughly 225 days out. Fall's first freeze usually shows up around 11/01, roughly 203 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Oak Lawn 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 9 weeks until Oak Lawn's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/10 isn't a guarantee
04/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/26 and only about 1 year in 10 sees frost after that.
Oak Lawn against the rest of the dataset
Oak Lawn's growing season runs about 203 days, ranking 16,842 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 148 of 1,548.
Learn more
Before leaning on 60453's figures: the frost range explains how to read the range around Oak Lawn's dates instead of trusting one, while local microclimates explains what one yard in Oak Lawn can differ from the 60453 normal.