Springfield, IL 62706 Frost Dates
Springfield, IL: when does the frost end?
Typically, the last spring freeze lands around 04/14, roughly 229 days out. Fall's first freeze usually shows up around 10/20, roughly 187 days after the last spring frost.
Springfield sits in USDA Zone 6a (-10 to -5°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
With roughly 8 weeks until Springfield'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
04/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/01 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/29 and only about 1 year in 10 sees frost after that.
Springfield against the rest of the dataset
At roughly 187 frost-free days, Springfield places 22,270 of 40,283 ZIP codes in this dataset. Within IL, it ranks 714 of 1,548.
Learn more
Before leaning on 62706's figures: the frost range explains how to read the range around Springfield's dates instead of trusting one, while local microclimates explains what one yard in Springfield can differ from the 62706 normal.