Geneseo, IL 61254 Frost Dates
61254, near Geneseo, IL: the frost window
The last spring frost here typically falls around 04/20, about 235 days from today. Fall's first freeze usually shows up around 10/20, roughly 180 days after the last spring frost.
Geneseo 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
Geneseo'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.
The actual range around Geneseo's last frost
04/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/06 and only about 1 year in 10 sees frost after that.
Geneseo against the rest of the dataset
At roughly 180 frost-free days, Geneseo places 24,841 of 40,283 ZIP codes in this dataset. Within IL, it ranks 957 of 1,548.
Learn more
Two guides worth reading on 61254: the frost range, on how to read the range around Geneseo's dates instead of trusting one, and local microclimates, on what one yard in Geneseo can differ from the 61254 normal.