Compton, IL 61318 Frost Dates
Frost dates for Compton, IL, ZIP 61318
Around 04/27 is the usual last spring frost, about 242 days away. The first fall frost typically arrives around 10/12, about 167 frost-free days later.
The USDA Plant Hardiness Zone Map puts Compton 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 Compton has about 6 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 Compton's last frost
04/27 is the middle of 30 years of NOAA records, not a promise. Plant by 04/12 and you're betting against frost in roughly 9 years out of 10. 05/14 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Compton compares
Compton's growing season runs about 167 days, ranking 30,191 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 1,462 of 1,548.
Learn more
the frost range explains how to read the range around Compton's dates instead of trusting one, and local microclimates explains what one yard in Compton can differ from the 61318 normal.