Countryside, IL 60525 Frost Dates
When can you plant in Countryside, IL?
Typically, the last spring freeze lands around 04/19, roughly 234 days out. The first fall frost typically arrives around 10/22, about 183 frost-free days later.
Countryside 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 8 weeks of growing season left in Countryside before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Countryside's last frost
04/19 is the middle of 30 years of NOAA records, not a promise. Plant by 04/06 and you're betting against frost in roughly 9 years out of 10. 05/05 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Countryside compares
Countryside's growing season runs about 183 days, ranking 23,826 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 883 of 1,548.
Learn more
local microclimates covers what one yard in Countryside can differ from the 60525 normal. zone vs. frost date covers why Zone 6a and Countryside's frost date answer different questions.