Ohlman, IL 62083 Frost Dates
Ohlman, IL: when does the frost end?
Around 04/12 is the usual last spring frost, about 227 days away. Fall's first freeze usually shows up around 10/20, roughly 190 days after the last spring frost.
Ohlman 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 Ohlman's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/12 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/29 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/27 and only about 1 year in 10 sees frost after that.
Ohlman against the rest of the dataset
Ohlman's growing season runs about 190 days, ranking 21,340 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 557 of 1,548.
Learn more
Before leaning on 62083's figures: the frost range explains how to read the range around Ohlman's dates instead of trusting one, while local microclimates explains what one yard in Ohlman can differ from the 62083 normal.