Castine, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Castine, a village in Preble County, Ohio.
Overnight
61°F
Light Rain Likely
Rain likely after 2am. Mostly cloudy, with a low around 61. South wind 15 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Castine
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 61°F | Light Rain Likely | 15 to 18 mph S | 71% |
| Wednesday | 66°F | Light Rain | 13 to 20 mph S | 98% |
| Wednesday Night | 48°F | Slight Chance Light Rain then Mostly Cloudy | 8 to 12 mph SW | 16% |
| Thursday | 61°F | Mostly Sunny | 8 to 15 mph SW | 0% |
| Thursday Night | 44°F | Mostly Cloudy | 5 to 9 mph SW | 12% |
| Friday | 55°F | Chance Light Rain | 5 to 12 mph W | 33% |
| Friday Night | 36°F | Chance Light Rain then Mostly Cloudy | 8 to 12 mph NW | 27% |
| Saturday | 52°F | Partly Sunny | 10 mph NW | 2% |
| Saturday Night | 32°F | Partly Cloudy | 7 mph NW | 2% |
| Sunday | 56°F | Sunny | 5 to 12 mph W | 3% |
| Sunday Night | 33°F | Mostly Clear | 6 to 9 mph W | 3% |
| Monday | 59°F | Sunny | 5 to 9 mph W | 3% |
| Monday Night | 37°F | Mostly Clear | 9 mph SW | 1% |
| Tuesday | 63°F | Sunny | 10 mph W | 1% |
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 Nov 4, 2026.