Cisne, IL 62823 Frost Dates
Frost dates for Cisne, IL, ZIP 62823
Around 04/09 is the usual last spring frost, about 224 days away. The first fall frost typically arrives around 10/24, about 198 frost-free days later.
Cisne sits in USDA Zone 6b (-5 to 0°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 6b around Cisne has about 8 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Cisne's last frost
04/09 is the middle of 30 years of NOAA records, not a promise. Plant by 03/29 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 Cisne compares
Cisne's growing season runs about 198 days, ranking 18,509 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 307 of 1,548.
Learn more
local microclimates explains what one yard in Cisne can differ from the 62823 normal, and zone vs. frost date explains why Zone 6b and Cisne's frost date answer different questions.