Kansas, IL 61933 Frost Dates
When can you plant in Kansas, IL?
Around 04/15 is the usual last spring frost, about 230 days away. The first fall frost typically arrives around 10/23, about 187 frost-free days later.
The USDA Plant Hardiness Zone Map puts Kansas in Zone 6a (-10 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 Kansas before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/15 isn't a guarantee
04/15 is the middle of 30 years of NOAA records, not a promise. Plant by 04/01 and you're betting against frost in roughly 9 years out of 10. 05/03 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Kansas compares
At roughly 187 frost-free days, Kansas places 22,528 of 40,283 ZIP codes in this dataset. Within IL, it ranks 778 of 1,548.
Learn more
local microclimates covers what one yard in Kansas can differ from the 61933 normal. zone vs. frost date covers why Zone 6a and Kansas's frost date answer different questions.