Avon, IL 61415 Frost Dates
When can you plant in Avon, IL?
The last spring frost here typically falls around 04/22, about 237 days from today. The first fall frost typically arrives around 10/19, about 177 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 Avon, not a forecast for this year.
What to do before the first frost
About 7 weeks of growing season left in Avon before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/22 isn't a guarantee
04/22 is the middle of 30 years of NOAA records, not a promise. Plant by 04/07 and you're betting against frost in roughly 9 years out of 10. 05/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Avon compares
About 177 days separate Avon's last and first frost, putting it 26,208 of 40,283 ZIP codes nationally. Within IL, it ranks 1,135 of 1,548.
Learn more
local microclimates covers what one yard in Avon can differ from the 61415 normal. zone vs. frost date covers why Zone 5b and Avon's frost date answer different questions.