Oak Park, IL 60304 Frost Dates
When can you plant in Oak Park, IL?
Around 04/11 is the usual last spring frost, about 226 days away. The first fall frost typically arrives around 10/31, about 201 frost-free days later.
Oak Park 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.
What to do before the first frost
About 9 weeks of growing season left in Oak Park before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/11 isn't a guarantee
04/11 is the middle of 30 years of NOAA records, not a promise. Plant by 03/30 and you're betting against frost in roughly 9 years out of 10. 04/27 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Oak Park compares
At roughly 201 frost-free days, Oak Park places 17,446 of 40,283 ZIP codes in this dataset. Within IL, it ranks 237 of 1,548.
Learn more
the frost range covers how to read the range around Oak Park's dates instead of trusting one. local microclimates covers what one yard in Oak Park can differ from the 60304 normal.