Strawn, IL 61775 Frost Dates
When can you plant in Strawn, IL?
Typically, the last spring freeze lands around 04/21, roughly 236 days out. The first fall frost typically arrives around 10/17, about 178 frost-free days later.
Strawn 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 7 weeks of growing season left in Strawn before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Strawn's last frost
04/21 is the middle of 30 years of NOAA records, not a promise. Plant by 04/10 and you're betting against frost in roughly 9 years out of 10. 05/05 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Strawn compares
About 178 days separate Strawn's last and first frost, putting it 25,941 of 40,283 ZIP codes nationally. Within IL, it ranks 1,112 of 1,548.
Learn more
local microclimates covers what one yard in Strawn can differ from the 61775 normal. zone vs. frost date covers why Zone 6a and Strawn's frost date answer different questions.