Libertyville, IA 52567 Frost Dates
Frost dates for Libertyville, IA, ZIP 52567
Around 04/27 is the usual last spring frost, about 242 days away. The first fall frost typically arrives around 10/12, about 168 frost-free days later.
Libertyville 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 Libertyville has about 6 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.
Why 04/27 isn't a guarantee
04/27 is the middle of 30 years of NOAA records, not a promise. Plant by 04/13 and you're betting against frost in roughly 9 years out of 10. 05/14 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Libertyville compares
Libertyville's growing season runs about 168 days, ranking 29,782 of 40,283 US ZIP codes measured here, longest to shortest. Within IA, it ranks 393 of 1,042.
Learn more
zone vs. frost date explains why Zone 5b and Libertyville's frost date answer different questions, and the frost range explains how to read the range around Libertyville's dates instead of trusting one.