Harrison, OH 45030 Frost Dates
45030, near Harrison, OH: the frost window
Around 04/16 is the usual last spring frost, about 231 days away. Fall's first freeze usually shows up around 10/28, roughly 193 days after the last spring frost.
Zone 6b (-5 to 0°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Harrison, not a forecast for this year.
Stretching the season past the first frost
Harrison's growing season runs out in roughly 9 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/16 isn't a guarantee
04/16 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/03 and only about 1 year in 10 sees frost after that.
Harrison against the rest of the dataset
At roughly 193 frost-free days, Harrison places 19,762 of 40,283 ZIP codes in this dataset. Within OH, it ranks 172 of 1,383.
Learn more
Two guides worth reading on 45030: the frost range, on how to read the range around Harrison's dates instead of trusting one, and local microclimates, on what one yard in Harrison can differ from the 45030 normal.