Peoria, IL 61613 Frost Dates
Frost dates for Peoria, IL, ZIP 61613
Typically, the last spring freeze lands around 04/16, roughly 231 days out. The first fall frost typically arrives around 10/23, about 189 frost-free days later.
Peoria 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 Peoria 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 04/16 isn't a guarantee
04/16 is the middle of 30 years of NOAA records, not a promise. Plant by 04/02 and you're betting against frost in roughly 9 years out of 10. 05/04 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Peoria compares
Peoria's growing season runs about 189 days, ranking 21,385 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 562 of 1,548.
Learn more
zone vs. frost date explains why Zone 6a and Peoria's frost date answer different questions, and the frost range explains how to read the range around Peoria's dates instead of trusting one.