Hebron, IL 60034 Frost Dates
When can you plant in Hebron, IL?
The last spring frost here typically falls around 04/30, about 245 days from today. The first fall frost typically arrives around 10/13, about 164 frost-free days later.
Hebron 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
About 7 weeks of growing season left in Hebron before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/30 isn't a guarantee
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/16 and you're betting against frost in roughly 9 years out of 10. 05/16 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Hebron compares
Hebron's growing season runs about 164 days, ranking 31,028 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 1,505 of 1,548.
Learn more
zone vs. frost date covers why Zone 5b and Hebron's frost date answer different questions. the frost range covers how to read the range around Hebron's dates instead of trusting one.