Bone Gap, IL 62815 Frost Dates
When can you plant in Bone Gap, IL?
Around 04/04 is the usual last spring frost, about 219 days away. The first fall frost typically arrives around 10/28, about 206 frost-free days later.
The USDA Plant Hardiness Zone Map puts Bone Gap 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 9 weeks of growing season left in Bone Gap before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/04 isn't a guarantee
04/04 is the middle of 30 years of NOAA records, not a promise. Plant by 03/20 and you're betting against frost in roughly 9 years out of 10. 04/20 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Bone Gap compares
Bone Gap's growing season runs about 206 days, ranking 16,139 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 103 of 1,548.
Learn more
local microclimates covers what one yard in Bone Gap can differ from the 62815 normal. zone vs. frost date covers why Zone 6b and Bone Gap's frost date answer different questions.