Cahokia Heights, IL 62206 Frost Dates
When can you plant in Cahokia Heights, IL?
Typically, the last spring freeze lands around 04/08, roughly 223 days out. The first fall frost typically arrives around 10/26, about 200 frost-free days later.
The USDA Plant Hardiness Zone Map puts Cahokia Heights in Zone 7a (0 to 5°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 Cahokia Heights before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/08 is the middle of 30 years of NOAA records, not a promise. Plant by 03/23 and you're betting against frost in roughly 9 years out of 10. 04/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Cahokia Heights compares
Cahokia Heights's growing season runs about 200 days, ranking 17,735 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 274 of 1,548.
Learn more
the frost range covers how to read the range around Cahokia Heights's dates instead of trusting one. local microclimates covers what one yard in Cahokia Heights can differ from the 62206 normal.