Woodstock, IL 60051 Frost Dates
When can you plant in Woodstock, IL?
Around 04/25 is the usual last spring frost, about 240 days away. The first fall frost typically arrives around 10/22, about 179 frost-free days later.
Woodstock sits in USDA Zone 5b (-15 to -10°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 Woodstock before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/25 isn't a guarantee
04/25 is the middle of 30 years of NOAA records, not a promise. Plant by 04/11 and you're betting against frost in roughly 9 years out of 10. 05/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Woodstock compares
At roughly 179 frost-free days, Woodstock places 25,189 of 40,283 ZIP codes in this dataset. Within IL, it ranks 995 of 1,548.
Learn more
zone vs. frost date covers why Zone 5b and Woodstock's frost date answer different questions. the frost range covers how to read the range around Woodstock's dates instead of trusting one.