Peoria Heights, IL 61603 Frost Dates
When can you plant in Peoria Heights, IL?
Around 04/16 is the usual last spring frost, about 231 days away. The first fall frost typically arrives around 10/23, about 189 frost-free days later.
The USDA Plant Hardiness Zone Map puts Peoria Heights 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
About 8 weeks of growing season left in Peoria Heights before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Peoria Heights'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 Peoria Heights compares
About 189 days separate Peoria Heights's last and first frost, putting it 21,534 of 40,283 ZIP codes nationally. Within IL, it ranks 586 of 1,548.
Learn more
zone vs. frost date covers why Zone 6a and Peoria Heights's frost date answer different questions. the frost range covers how to read the range around Peoria Heights's dates instead of trusting one.