Pekin, IL 61555 Frost Dates
When can you plant in Pekin, IL?
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.
Pekin 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
About 8 weeks of growing season left in Pekin before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Pekin's last frost
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 Pekin compares
About 189 days separate Pekin's last and first frost, putting it 21,409 of 40,283 ZIP codes nationally. Within IL, it ranks 570 of 1,548.
Learn more
zone vs. frost date covers why Zone 6a and Pekin's frost date answer different questions. the frost range covers how to read the range around Pekin's dates instead of trusting one.