Wheaton, IL 60522 Frost Dates
Frost dates for Wheaton, IL, ZIP 60522
The last spring frost here typically falls around 04/27, about 242 days from today. The first fall frost typically arrives around 10/17, about 173 frost-free days later.
Wheaton 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
Zone 6a around Wheaton 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 Wheaton'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 Wheaton compares
About 173 days separate Wheaton's last and first frost, putting it 27,761 of 40,283 ZIP codes nationally. Within IL, it ranks 1,293 of 1,548.
Learn more
the frost range explains how to read the range around Wheaton's dates instead of trusting one, and local microclimates explains what one yard in Wheaton can differ from the 60522 normal.