Caledonia, OH 43335 Frost Dates
43335, near Caledonia, OH: the frost window
Around 04/24 is the usual last spring frost, about 239 days away. Fall's first freeze usually shows up around 10/20, roughly 178 days after the last spring frost.
Zone 6a (-10 to -5°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 Caledonia, not a forecast for this year.
Stretching the season past the first frost
Caledonia'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 04/24 isn't a guarantee
04/24 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/11 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/10 and only about 1 year in 10 sees frost after that.
Caledonia against the rest of the dataset
Caledonia's growing season runs about 178 days, ranking 25,869 of 40,283 US ZIP codes measured here, longest to shortest. Within OH, it ranks 881 of 1,383.
Learn more
Two guides worth reading on 43335: local microclimates, on what one yard in Caledonia can differ from the 43335 normal, and zone vs. frost date, on why Zone 6a and Caledonia's frost date answer different questions.