Miamisburg, OH 45342 Frost Dates
45342, near Miamisburg, OH: the frost window
Typically, the last spring freeze lands around 04/17, roughly 232 days out. Fall's first freeze usually shows up around 10/26, roughly 192 days after the last spring frost.
Miamisburg sits in USDA Zone 6b (-5 to 0°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
Miamisburg'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 Miamisburg's last frost
04/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/03 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.
Miamisburg against the rest of the dataset
Miamisburg's growing season runs about 192 days, ranking 20,193 of 40,283 US ZIP codes measured here, longest to shortest. Within OH, it ranks 214 of 1,383.
Learn more
Two guides worth reading on 45342: the frost range, on how to read the range around Miamisburg's dates instead of trusting one, and local microclimates, on what one yard in Miamisburg can differ from the 45342 normal.