Riverton, IL 62761 Frost Dates
Frost dates for Riverton, IL, ZIP 62761
Around 04/14 is the usual last spring frost, about 229 days away. The first fall frost typically arrives around 10/20, about 187 frost-free days later.
Riverton 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 Riverton 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 Riverton's last frost
04/14 is the middle of 30 years of NOAA records, not a promise. Plant by 04/01 and you're betting against frost in roughly 9 years out of 10. 04/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Riverton compares
About 187 days separate Riverton's last and first frost, putting it 22,375 of 40,283 ZIP codes nationally. Within IL, it ranks 725 of 1,548.
Learn more
the frost range explains how to read the range around Riverton's dates instead of trusting one, and local microclimates explains what one yard in Riverton can differ from the 62761 normal.