Winfield, IL 60190 Frost Dates
60190, near Winfield, IL: the frost window
Typically, the last spring freeze lands around 04/27, roughly 242 days out. Fall's first freeze usually shows up around 10/17, roughly 173 days after the last spring frost.
Winfield 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
Winfield'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.
The actual range around Winfield's last frost
04/27 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/14 and only about 1 year in 10 sees frost after that.
Winfield against the rest of the dataset
At roughly 173 frost-free days, Winfield places 27,816 of 40,283 ZIP codes in this dataset. Within IL, it ranks 1,314 of 1,548.
Learn more
Two guides worth reading on 60190: local microclimates, on what one yard in Winfield can differ from the 60190 normal, and zone vs. frost date, on why Zone 5b and Winfield's frost date answer different questions.