Lenzburg, IL 62255 Frost Dates
When can you plant in Lenzburg, IL?
Typically, the last spring freeze lands around 04/12, roughly 227 days out. The first fall frost typically arrives around 10/22, about 191 frost-free days later.
Lenzburg 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 Lenzburg before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Lenzburg's last frost
04/12 is the middle of 30 years of NOAA records, not a promise. Plant by 03/29 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 Lenzburg compares
About 191 days separate Lenzburg's last and first frost, putting it 20,895 of 40,283 ZIP codes nationally. Within IL, it ranks 464 of 1,548.
Learn more
local microclimates covers what one yard in Lenzburg can differ from the 62255 normal. zone vs. frost date covers why Zone 6b and Lenzburg's frost date answer different questions.