Oglesby, IL 61348 Frost Dates
When can you plant in Oglesby, IL?
The last spring frost here typically falls around 04/24, about 239 days from today. The first fall frost typically arrives around 10/18, about 176 frost-free days later.
Oglesby 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 Oglesby before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/24 isn't a guarantee
04/24 is the middle of 30 years of NOAA records, not a promise. Plant by 04/11 and you're betting against frost in roughly 9 years out of 10. 05/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Oglesby compares
At roughly 176 frost-free days, Oglesby places 26,450 of 40,283 ZIP codes in this dataset. Within IL, it ranks 1,174 of 1,548.
Learn more
zone vs. frost date covers why Zone 5b and Oglesby's frost date answer different questions. the frost range covers how to read the range around Oglesby's dates instead of trusting one.