Pecatonica, IL 61063 Frost Dates
Frost dates for Pecatonica, IL, ZIP 61063
Around 04/26 is the usual last spring frost, about 241 days away. The first fall frost typically arrives around 10/13, about 169 frost-free days later.
Pecatonica 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
Zone 5b around Pecatonica has about 7 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Pecatonica's last frost
04/26 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. 05/11 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Pecatonica compares
Pecatonica's growing season runs about 169 days, ranking 29,472 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 1,427 of 1,548.
Learn more
local microclimates explains what one yard in Pecatonica can differ from the 61063 normal, and zone vs. frost date explains why Zone 5b and Pecatonica's frost date answer different questions.