Omaha, IL 62871 Frost Dates
Omaha, IL: when does the frost end?
Around 04/15 is the usual last spring frost, about 230 days away. Fall's first freeze usually shows up around 10/19, roughly 183 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Omaha in Zone 7a (0 to 5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 7 weeks until Omaha's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Omaha's last frost
04/15 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/02 and only about 1 year in 10 sees frost after that.
Omaha against the rest of the dataset
About 183 days separate Omaha's last and first frost, putting it 24,026 of 40,283 ZIP codes nationally. Within IL, it ranks 890 of 1,548.
Learn more
Before leaning on 62871's figures: the frost range explains how to read the range around Omaha's dates instead of trusting one, while local microclimates explains what one yard in Omaha can differ from the 62871 normal.