Casey, IL 62420 Frost Dates
When can you plant in Casey, IL?
Around 04/14 is the usual last spring frost, about 229 days away. The first fall frost typically arrives around 10/20, about 187 frost-free days later.
Zone 6b (-5 to 0°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Casey, not a forecast for this year.
What to do before the first frost
About 8 weeks of growing season left in Casey 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
04/14 is the middle of 30 years of NOAA records, not a promise. Plant by 04/02 and you're betting against frost in roughly 9 years out of 10. 04/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Casey compares
About 187 days separate Casey's last and first frost, putting it 22,401 of 40,283 ZIP codes nationally. Within IL, it ranks 727 of 1,548.
Learn more
local microclimates covers what one yard in Casey can differ from the 62420 normal. zone vs. frost date covers why Zone 6b and Casey's frost date answer different questions.