Spring Valley, OH 45370 Frost Dates
45370, near Spring Valley, OH: the frost window
The last spring frost here typically falls around 04/18, about 233 days from today. 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 Spring Valley, not a forecast for this year.
Stretching the season past the first frost
Spring Valley'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 04/18 isn't a guarantee
04/18 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/03 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/04 and only about 1 year in 10 sees frost after that.
Spring Valley against the rest of the dataset
About 188 days separate Spring Valley's last and first frost, putting it 22,170 of 40,283 ZIP codes nationally. Within OH, it ranks 406 of 1,383.
Learn more
Two guides worth reading on 45370: local microclimates, on what one yard in Spring Valley can differ from the 45370 normal, and zone vs. frost date, on why Zone 6b and Spring Valley's frost date answer different questions.