Hoyleton, IL 62803 Frost Dates
Frost dates for Hoyleton, IL, ZIP 62803
Around 04/07 is the usual last spring frost, about 222 days away. The first fall frost typically arrives around 10/26, about 201 frost-free days later.
Hoyleton 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 Hoyleton 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.
Why 04/07 isn't a guarantee
04/07 is the middle of 30 years of NOAA records, not a promise. Plant by 03/24 and you're betting against frost in roughly 9 years out of 10. 04/22 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Hoyleton compares
Hoyleton's growing season runs about 201 days, ranking 17,630 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 259 of 1,548.
Learn more
zone vs. frost date explains why Zone 6b and Hoyleton's frost date answer different questions, and the frost range explains how to read the range around Hoyleton's dates instead of trusting one.