Champaign, IL 61822 Frost Dates
Frost dates for Champaign, IL, ZIP 61822
The last spring frost here typically falls around 04/15, about 230 days from today. The first fall frost typically arrives around 10/24, about 190 frost-free days later.
The USDA Plant Hardiness Zone Map puts Champaign in Zone 6a (-10 to -5°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 6a around Champaign has about 8 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.
Why 04/15 isn't a guarantee
04/15 is the middle of 30 years of NOAA records, not a promise. Plant by 04/01 and you're betting against frost in roughly 9 years out of 10. 04/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Champaign compares
At roughly 190 frost-free days, Champaign places 20,983 of 40,283 ZIP codes in this dataset. Within IL, it ranks 486 of 1,548.
Learn more
the frost range explains how to read the range around Champaign's dates instead of trusting one, and local microclimates explains what one yard in Champaign can differ from the 61822 normal.