Creve Coeur, IL 61610 Frost Dates
61610, near Creve Coeur, IL: the frost window
The last spring frost here typically falls around 04/16, about 231 days from today. Fall's first freeze usually shows up around 10/23, roughly 189 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Creve Coeur 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
Creve Coeur'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 04/16 isn't a guarantee
04/16 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/04 and only about 1 year in 10 sees frost after that.
Creve Coeur against the rest of the dataset
About 189 days separate Creve Coeur's last and first frost, putting it 21,552 of 40,283 ZIP codes nationally. Within IL, it ranks 589 of 1,548.
Learn more
Two guides worth reading on 61610: the frost range, on how to read the range around Creve Coeur's dates instead of trusting one, and local microclimates, on what one yard in Creve Coeur can differ from the 61610 normal.