Sheffield, IL 61361 Frost Dates
Frost dates for Sheffield, IL, ZIP 61361
Around 04/24 is the usual last spring frost, about 239 days away. The first fall frost typically arrives around 10/14, about 172 frost-free days later.
Zone 5b (-15 to -10°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 Sheffield, not a forecast for this year.
What to do before the first frost
Zone 5b around Sheffield has about 7 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
04/24 is the middle of 30 years of NOAA records, not a promise. Plant by 04/10 and you're betting against frost in roughly 9 years out of 10. 05/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Sheffield compares
At roughly 172 frost-free days, Sheffield places 28,411 of 40,283 ZIP codes in this dataset. Within IL, it ranks 1,350 of 1,548.
Learn more
the frost range explains how to read the range around Sheffield's dates instead of trusting one, and local microclimates explains what one yard in Sheffield can differ from the 61361 normal.