Fillmore, IL 62032 Frost Dates
Frost dates for Fillmore, IL, ZIP 62032
Typically, the last spring freeze lands around 04/03, roughly 218 days out. The first fall frost typically arrives around 10/24, about 202 frost-free days later.
Fillmore 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 Fillmore 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.
How much risk comes with planting early here
04/03 is the middle of 30 years of NOAA records, not a promise. Plant by 03/19 and you're betting against frost in roughly 9 years out of 10. 04/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Fillmore compares
At roughly 202 frost-free days, Fillmore places 17,353 of 40,283 ZIP codes in this dataset. Within IL, it ranks 190 of 1,548.
Learn more
local microclimates explains what one yard in Fillmore can differ from the 62032 normal, and zone vs. frost date explains why Zone 6b and Fillmore's frost date answer different questions.