Sleepy Hollow, IL 60118 Frost Dates
60118, near Sleepy Hollow, IL: the frost window
Typically, the last spring freeze lands around 04/25, roughly 240 days out. Fall's first freeze usually shows up around 10/19, roughly 177 days after the last spring frost.
Sleepy Hollow sits in USDA Zone 5b (-15 to -10°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
Sleepy Hollow'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.
How much risk comes with planting early here
04/25 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/10 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/12 and only about 1 year in 10 sees frost after that.
Sleepy Hollow against the rest of the dataset
Sleepy Hollow's growing season runs about 177 days, ranking 26,122 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 1,125 of 1,548.
Learn more
Two guides worth reading on 60118: the frost range, on how to read the range around Sleepy Hollow's dates instead of trusting one, and local microclimates, on what one yard in Sleepy Hollow can differ from the 60118 normal.