Palos Park, IL 60464 Frost Dates
60464, near Palos Park, IL: the frost window
Typically, the last spring freeze lands around 04/19, roughly 234 days out. Fall's first freeze usually shows up around 10/22, roughly 183 days after the last spring frost.
Palos Park 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.
Stretching the season past the first frost
Palos Park's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/19 isn't a guarantee
04/19 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/05 and only about 1 year in 10 sees frost after that.
Palos Park against the rest of the dataset
Palos Park's growing season runs about 183 days, ranking 23,851 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 885 of 1,548.
Learn more
Two guides worth reading on 60464: zone vs. frost date, on why Zone 6a and Palos Park's frost date answer different questions, and the frost range, on how to read the range around Palos Park's dates instead of trusting one.