Vergennes, IL 62994 Frost Dates
Frost dates for Vergennes, IL, ZIP 62994
Typically, the last spring freeze lands around 04/09, roughly 224 days out. The first fall frost typically arrives around 10/22, about 195 frost-free days later.
Vergennes sits in USDA Zone 7a (0 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 7a around Vergennes 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
04/09 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. 04/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Vergennes compares
At roughly 195 frost-free days, Vergennes places 19,362 of 40,283 ZIP codes in this dataset. Within IL, it ranks 351 of 1,548.
Learn more
zone vs. frost date explains why Zone 7a and Vergennes's frost date answer different questions, and the frost range explains how to read the range around Vergennes's dates instead of trusting one.