Rockdale, IL 60434 Frost Dates
60434, near Rockdale, IL: the frost window
Around 04/19 is the usual last spring frost, about 234 days away. Fall's first freeze usually shows up around 10/25, roughly 188 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Rockdale in Zone 6a (-10 to -5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Rockdale'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 04/03 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/07 and only about 1 year in 10 sees frost after that.
Rockdale against the rest of the dataset
Rockdale's growing season runs about 188 days, ranking 22,082 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 686 of 1,548.
Learn more
Two guides worth reading on 60434: the frost range, on how to read the range around Rockdale's dates instead of trusting one, and local microclimates, on what one yard in Rockdale can differ from the 60434 normal.