Cornell, IL 61313 Frost Dates
Frost dates for Cornell, IL, ZIP 61313
The last spring frost here typically falls around 04/12, about 227 days from today. The first fall frost typically arrives around 10/28, about 199 frost-free days later.
Cornell sits in USDA Zone 5b (-15 to -10°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 5b around Cornell has about 9 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 Cornell's last frost
04/12 is the middle of 30 years of NOAA records, not a promise. Plant by 03/30 and you're betting against frost in roughly 9 years out of 10. 04/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Cornell compares
About 199 days separate Cornell's last and first frost, putting it 18,191 of 40,283 ZIP codes nationally. Within IL, it ranks 296 of 1,548.
Learn more
zone vs. frost date explains why Zone 5b and Cornell's frost date answer different questions, and the frost range explains how to read the range around Cornell's dates instead of trusting one.