Ottawa Hills, OH 43699 Frost Dates
43699, near Ottawa Hills, OH: the frost window
Around 04/22 is the usual last spring frost, about 237 days away. Fall's first freeze usually shows up around 10/24, roughly 188 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 Ottawa Hills, not a forecast for this year.
Stretching the season past the first frost
Ottawa Hills'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.
Why 04/22 isn't a guarantee
04/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/07 and only about 1 year in 10 sees frost after that.
Ottawa Hills against the rest of the dataset
At roughly 188 frost-free days, Ottawa Hills places 22,009 of 40,283 ZIP codes in this dataset. Within OH, it ranks 384 of 1,383.
Learn more
Two guides worth reading on 43699: local microclimates, on what one yard in Ottawa Hills can differ from the 43699 normal, and zone vs. frost date, on why Zone 6b and Ottawa Hills's frost date answer different questions.