Du Bois, IL 62831 Frost Dates
When can you plant in Du Bois, IL?
The last spring frost here typically falls around 04/07, about 222 days from today. The first fall frost typically arrives around 10/26, about 201 frost-free days later.
The USDA Plant Hardiness Zone Map puts Du Bois in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 8 weeks of growing season left in Du Bois before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Du Bois's last frost
04/07 is the middle of 30 years of NOAA records, not a promise. Plant by 03/24 and you're betting against frost in roughly 9 years out of 10. 04/22 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Du Bois compares
Du Bois's growing season runs about 201 days, ranking 17,670 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 267 of 1,548.
Learn more
zone vs. frost date covers why Zone 6b and Du Bois's frost date answer different questions. the frost range covers how to read the range around Du Bois's dates instead of trusting one.