Andover, IL 61262 Frost Dates
61262, near Andover, IL: the frost window
Typically, the last spring freeze lands around 04/24, roughly 239 days out. Fall's first freeze usually shows up around 10/18, roughly 176 days after the last spring frost.
Andover 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
Andover'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 Andover's last frost
04/24 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/09 and only about 1 year in 10 sees frost after that.
Andover against the rest of the dataset
About 176 days separate Andover's last and first frost, putting it 26,599 of 40,283 ZIP codes nationally. Within IL, it ranks 1,191 of 1,548.
Learn more
Two guides worth reading on 61262: the frost range, on how to read the range around Andover's dates instead of trusting one, and local microclimates, on what one yard in Andover can differ from the 61262 normal.