South Elgin, IL 60177 Frost Dates
60177, near South Elgin, IL: the frost window
Around 04/30 is the usual last spring frost, about 245 days away. Fall's first freeze usually shows up around 10/13, roughly 163 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts South Elgin in Zone 5b (-15 to -10°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
South Elgin's growing season runs out in roughly 7 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/30 isn't a guarantee
04/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/16 and only about 1 year in 10 sees frost after that.
South Elgin against the rest of the dataset
South Elgin's growing season runs about 163 days, ranking 31,320 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 1,518 of 1,548.
Learn more
Two guides worth reading on 60177: local microclimates, on what one yard in South Elgin can differ from the 60177 normal, and zone vs. frost date, on why Zone 5b and South Elgin's frost date answer different questions.