Martinsville, OH 45146 Frost Dates
45146, near Martinsville, OH: the frost window
Typically, the last spring freeze lands around 04/19, roughly 234 days out. Fall's first freeze usually shows up around 10/22, roughly 185 days after the last spring frost.
Martinsville 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
Martinsville'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 Martinsville's last frost
04/19 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/05 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.
Martinsville against the rest of the dataset
About 185 days separate Martinsville's last and first frost, putting it 23,300 of 40,283 ZIP codes nationally. Within OH, it ranks 583 of 1,383.
Learn more
Two guides worth reading on 45146: the frost range, on how to read the range around Martinsville's dates instead of trusting one, and local microclimates, on what one yard in Martinsville can differ from the 45146 normal.