Lyons, IL 60534 Frost Dates
When can you plant in Lyons, IL?
Around 04/11 is the usual last spring frost, about 226 days away. The first fall frost typically arrives around 10/31, about 201 frost-free days later.
Lyons 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
About 9 weeks of growing season left in Lyons before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/11 is the middle of 30 years of NOAA records, not a promise. Plant by 03/30 and you're betting against frost in roughly 9 years out of 10. 04/27 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Lyons compares
Lyons's growing season runs about 201 days, ranking 17,473 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 248 of 1,548.
Learn more
local microclimates covers what one yard in Lyons can differ from the 60534 normal. zone vs. frost date covers why Zone 6a and Lyons's frost date answer different questions.