Castine, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Castine, a village in Preble County, Ohio.
Today
83°F
Mostly Cloudy then Chance Showers And Thunderstorms
A chance of showers and thunderstorms between noon and 3pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 83. Southeast wind around 8 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Castine
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Mostly Cloudy then Chance Showers And Thunderstorms | 8 mph SE | 68% |
| Tonight | 66°F | Chance Showers And Thunderstorms | 5 to 8 mph S | 49% |
| Sunday | 82°F | Chance Showers And Thunderstorms | 6 to 10 mph W | 48% |
| Sunday Night | 57°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 14 mph NE | 64% |
| Monday | 68°F | Rain Showers Likely | 14 mph NE | 56% |
| Monday Night | 52°F | Chance Rain Showers | 12 to 16 mph NE | 52% |
| Tuesday | 68°F | Slight Chance Rain Showers | 12 to 15 mph NE | 17% |
| Tuesday Night | 54°F | Chance Rain Showers | 9 to 15 mph NE | 37% |
| Wednesday | 68°F | Chance Rain Showers | 10 mph NE | 43% |
| Wednesday Night | 54°F | Chance Rain Showers | 7 to 12 mph NE | 43% |
| Thursday | 69°F | Mostly Cloudy | 7 to 10 mph N | 12% |
| Thursday Night | 53°F | Mostly Cloudy | 6 to 10 mph N | 11% |
| Friday | 70°F | Mostly Sunny | 7 to 12 mph NE | 8% |
| Friday Night | 50°F | Partly Cloudy | 6 to 12 mph NE | 8% |
Forecast source: National Weather Service (api.weather.gov) for Castine (39.931, -84.625). Updated through the day.
Growing snapshot for Castine
Last spring frost
Apr 25
First fall frost
Oct 20
Growing season
176 days
Hardiness zone
6a
More local growing data for Castine: nearby ZIP 45382 weather · frost dates · planting calendar · Ohio frost dates
Nearby towns & communities
Camden
Eaton
Eldorado
Gordon
Gratis
Lake Lakengren
Lewisburg
New Paris
Verona
West Alexandria
West Elkton
West Manchester
Climate data from the nearest NOAA station, Eaton, Oh (11.7 mi from Castine). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.