Castalia, OH 44824 Frost Dates
Castalia, OH: when does the frost end?
Around 04/10 is the usual last spring frost, about 225 days away. Fall's first freeze usually shows up around 11/05, roughly 209 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Castalia in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 10 weeks until Castalia's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Castalia's last frost
04/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/31 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/23 and only about 1 year in 10 sees frost after that.
Castalia against the rest of the dataset
At roughly 209 frost-free days, Castalia places 15,349 of 40,283 ZIP codes in this dataset. Within OH, it ranks 55 of 1,383.
Learn more
Before leaning on 44824's figures: the frost range explains how to read the range around Castalia's dates instead of trusting one, while local microclimates explains what one yard in Castalia can differ from the 44824 normal.