Okawville, IL 62271 Frost Dates
Okawville, IL: when does the frost end?
Typically, the last spring freeze lands around 04/07, roughly 222 days out. Fall's first freeze usually shows up around 10/26, roughly 201 days after the last spring frost.
Okawville sits in USDA Zone 6b (-5 to 0°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.
Stretching the season past the first frost
With roughly 8 weeks until Okawville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Okawville's last frost
04/07 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/24 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/22 and only about 1 year in 10 sees frost after that.
Okawville against the rest of the dataset
Okawville's growing season runs about 201 days, ranking 17,564 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 256 of 1,548.
Learn more
Before leaning on 62271's figures: local microclimates explains what one yard in Okawville can differ from the 62271 normal, while zone vs. frost date explains why Zone 6b and Okawville's frost date answer different questions.