Cerro Gordo, IL 61818 Frost Dates
Frost dates for Cerro Gordo, IL, ZIP 61818
Typically, the last spring freeze lands around 04/16, roughly 231 days out. The first fall frost typically arrives around 10/22, about 187 frost-free days later.
Cerro Gordo sits in USDA Zone 6a (-10 to -5°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 6a around Cerro Gordo 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 Cerro Gordo's last frost
04/16 is the middle of 30 years of NOAA records, not a promise. Plant by 04/03 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 Cerro Gordo compares
About 187 days separate Cerro Gordo's last and first frost, putting it 22,484 of 40,283 ZIP codes nationally. Within IL, it ranks 763 of 1,548.
Learn more
the frost range explains how to read the range around Cerro Gordo's dates instead of trusting one, and local microclimates explains what one yard in Cerro Gordo can differ from the 61818 normal.