Cissna Park, IL 60924 Frost Dates
When can you plant in Cissna Park, IL?
Around 04/22 is the usual last spring frost, about 237 days away. The first fall frost typically arrives around 10/19, about 180 frost-free days later.
Zone 6a (-10 to -5°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 Cissna Park, not a forecast for this year.
What to do before the first frost
About 7 weeks of growing season left in Cissna Park before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/22 isn't a guarantee
04/22 is the middle of 30 years of NOAA records, not a promise. Plant by 04/07 and you're betting against frost in roughly 9 years out of 10. 05/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Cissna Park compares
At roughly 180 frost-free days, Cissna Park places 24,988 of 40,283 ZIP codes in this dataset. Within IL, it ranks 967 of 1,548.
Learn more
the frost range covers how to read the range around Cissna Park's dates instead of trusting one. local microclimates covers what one yard in Cissna Park can differ from the 60924 normal.