Springfield, OH 45503 Frost Dates
45503, near Springfield, OH: the frost window
The last spring frost here typically falls around 04/25, about 240 days from today. Fall's first freeze usually shows up around 10/19, roughly 175 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
Springfield'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.
Why 04/25 isn't a guarantee
04/25 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 05/12 and only about 1 year in 10 sees frost after that.
Springfield against the rest of the dataset
Springfield's growing season runs about 175 days, ranking 26,723 of 40,283 US ZIP codes measured here, longest to shortest. Within OH, it ranks 1,007 of 1,383.
Learn more
Two guides worth reading on 45503: local microclimates, on what one yard in Springfield can differ from the 45503 normal, and zone vs. frost date, on why Zone 6a and Springfield's frost date answer different questions.