Washington Park, IL 62203 Frost Dates
62203, near Washington Park, IL: the frost window
Around 04/08 is the usual last spring frost, about 223 days away. Fall's first freeze usually shows up around 10/26, roughly 200 days after the last spring frost.
Zone 7a (0 to 5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Washington Park, not a forecast for this year.
Stretching the season past the first frost
Washington 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.
The actual range around Washington Park's last frost
04/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/23 and only about 1 year in 10 sees frost after that.
Washington Park against the rest of the dataset
About 200 days separate Washington Park's last and first frost, putting it 17,800 of 40,283 ZIP codes nationally. Within IL, it ranks 281 of 1,548.
Learn more
Two guides worth reading on 62203: the frost range, on how to read the range around Washington Park's dates instead of trusting one, and local microclimates, on what one yard in Washington Park can differ from the 62203 normal.