Vernon, IL 62885 Frost Dates
When can you plant in Vernon, IL?
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.
Vernon 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
About 8 weeks of growing season left in Vernon before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/03 isn't a guarantee
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 Vernon compares
At roughly 202 frost-free days, Vernon places 17,386 of 40,283 ZIP codes in this dataset. Within IL, it ranks 194 of 1,548.
Learn more
local microclimates covers what one yard in Vernon can differ from the 62885 normal. zone vs. frost date covers why Zone 6b and Vernon's frost date answer different questions.