Mahomet, IL 61853 Frost Dates
Mahomet, IL: when does the frost end?
Around 04/23 is the usual last spring frost, about 238 days away. Fall's first freeze usually shows up around 10/13, roughly 170 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Mahomet in Zone 6a (-10 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 Mahomet's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/23 isn't a guarantee
04/23 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/09 and only about 1 year in 10 sees frost after that.
Mahomet against the rest of the dataset
Mahomet's growing season runs about 170 days, ranking 28,942 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 1,389 of 1,548.
Learn more
Before leaning on 61853's figures: local microclimates explains what one yard in Mahomet can differ from the 61853 normal, while zone vs. frost date explains why Zone 6a and Mahomet's frost date answer different questions.