Roseville, IL 61473 Frost Dates
Roseville, IL: when does the frost end?
Typically, the last spring freeze lands around 04/22, roughly 237 days out. Fall's first freeze usually shows up around 10/19, roughly 177 days after the last spring frost.
Zone 5b (-15 to -10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Roseville, not a forecast for this year.
Stretching the season past the first frost
With roughly 7 weeks until Roseville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/07 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/08 and only about 1 year in 10 sees frost after that.
Roseville against the rest of the dataset
Roseville's growing season runs about 177 days, ranking 26,200 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 1,133 of 1,548.
Learn more
Before leaning on 61473's figures: the frost range explains how to read the range around Roseville's dates instead of trusting one, while local microclimates explains what one yard in Roseville can differ from the 61473 normal.