Carol Stream, IL 60188 Frost Dates
Frost dates for Carol Stream, IL, ZIP 60188
Around 04/30 is the usual last spring frost, about 245 days away. The first fall frost typically arrives around 10/13, about 163 frost-free days later.
The USDA Plant Hardiness Zone Map puts Carol Stream in Zone 5b (-15 to -10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 5b around Carol Stream has about 7 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Carol Stream's last frost
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/17 and you're betting against frost in roughly 9 years out of 10. 05/16 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Carol Stream compares
About 163 days separate Carol Stream's last and first frost, putting it 31,317 of 40,283 ZIP codes nationally. Within IL, it ranks 1,515 of 1,548.
Learn more
the frost range explains how to read the range around Carol Stream's dates instead of trusting one, and local microclimates explains what one yard in Carol Stream can differ from the 60188 normal.