Troy, OH 45373 Frost Dates
45373, near Troy, OH: the frost window
Around 04/18 is the usual last spring frost, about 233 days away. Fall's first freeze usually shows up around 10/23, roughly 186 days after the last spring frost.
Troy 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
Troy'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.
How much risk comes with planting early here
04/18 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 05/05 and only about 1 year in 10 sees frost after that.
Troy against the rest of the dataset
About 186 days separate Troy's last and first frost, putting it 22,716 of 40,283 ZIP codes nationally. Within OH, it ranks 459 of 1,383.
Learn more
Two guides worth reading on 45373: zone vs. frost date, on why Zone 6a and Troy's frost date answer different questions, and the frost range, on how to read the range around Troy's dates instead of trusting one.