Weather & Climate in Castine, OH
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Castine experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 27°F in January while summers reach 74°F in July. Annual precipitation totals 42.1 inches. The area receives 12.4 inches of snow annually. Air quality is rated Good with a median AQI of 44. 69% of days have good air quality. The city sits at an elevation of 1,079 feet.
Temperature
27°F Jan (-3°C)
74°F Jul (23°C)
| Annual Average | 51.9°F |
| 4% below US avg | |
| January Average | 27°F (-3°C) |
| July Average | 74°F (23°C) |
Geography
| Elevation | 1,079 ft (329 m) |
| Area | 0.1 sq mi (0.2 km²) |
| Population Density | 963/sq mi |
| Coordinates | 39.9310°N, 84.6247°W |
| Timezone | America/New_York |
| County | Preble County County |
| Nearest Airport | James M Cox Dayton International (DAY) 22 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 44.0 |
| Rating | Good |
| Good Days % | 68.9% |
| Unhealthy Days | 0 |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 43.3 / 100 |
| Social Vulnerability | 30.9 / 100 |
| Community Resilience | 66.6 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively Moderate |
| Drought | Very Low |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
9 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.8.
| Sep 12, 2004 | 4 km NW of Manilla, Indiana | M3.8 | 96 km | 2 km |
| Feb 19, 1995 | 8 km SSE of Rocky Fork Point, Ohio | M3.6 | 134 km | 10 km |
| Apr 17, 1990 | 8 km NW of Fort Recovery, Ohio | M3.0 | 62 km | 5 km |
| Apr 4, 1994 | 2 km WNW of Minster, Ohio | M2.9 | 56 km | 5 km |
| May 12, 2006 | 2 km E of Lima, Ohio | M2.8 | 101 km | 5 km |
| Mar 17, 1999 | 2 km NNE of Ripley, Ohio | M2.8 | 147 km | 0 km |
| Jun 12, 2015 | 6 km NW of Convoy, Ohio | M2.6 | 115 km | 5 km |
| Jul 23, 2013 | 6 km NNE of Germantown, Kentucky | M2.6 | 148 km | 4 km |
| Jan 30, 2004 | 2 km S of Rockford, Ohio | M2.5 | 82 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
530 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 70 fatalities, 2,504 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 3, 1974 | EF5 | 59 km | 31.3 mi | 36 |
| May 27, 2019 | EF4 | 18 km | 18.2 mi | 0 |
| Nov 10, 2002 | EF4 | 95 km | 52.8 mi | 4 |
| Sep 20, 2000 | EF4 | 63 km | 9.0 mi | 1 |
| Apr 9, 1999 | EF4 | 81 km | 10.0 mi | 4 |
| Feb 18, 1992 | EF4 | 89 km | 2.8 mi | 0 |
| Jun 2, 1990 | EF4 | 83 km | 33.0 mi | 0 |
| Jul 9, 1980 | EF4 | 81 km | 11.0 mi | 2 |
| Apr 3, 1974 | EF4 | 90 km | 18.9 mi | 0 |
| Apr 3, 1974 | EF4 | 84 km | 19.8 mi | 2 |
| Apr 3, 1974 | EF4 | 57 km | 18.0 mi | 1 |
| Apr 23, 1968 | EF4 | 97 km | 24.1 mi | 1 |
| Apr 11, 1965 | EF4 | 51 km | 18.4 mi | 3 |
| Apr 11, 1965 | EF4 | 94 km | 52.5 mi | 4 |
| Mar 14, 2024 | EF3 | 76 km | 31.3 mi | 3 |
| Mar 14, 2024 | EF3 | 51 km | 41.3 mi | 1 |
| May 27, 2019 | EF3 | 97 km | 12.8 mi | 0 |
| May 27, 2019 | EF3 | 14 km | 10.5 mi | 0 |
| May 27, 2019 | EF3 | 48 km | 9.9 mi | 0 |
| May 27, 2019 | EF3 | 69 km | 10.8 mi | 1 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 27°F (-3°C) | 3.3 in | Coldest |
| February | 30°F (-1°C) | 2.4 in | Driest |
| March | 40°F (4°C) | 3.4 in | |
| April | 52°F (11°C) | 4.2 in | |
| May | 63°F (17°C) | 4.5 in | |
| June | 71°F (22°C) | 4.7 in | Wettest |
| July | 74°F (23°C) | 4.0 in | Warmest |
| August | 72°F (22°C) | 3.2 in | |
| September | 66°F (19°C) | 3.2 in | |
| October | 54°F (12°C) | 3.1 in | |
| November | 42°F (6°C) | 3.1 in | |
| December | 32°F (0°C) | 3.0 in |
Castine has a seasonal temperature swing of 47°F / from 27°F in January to 74°F in July. Total annual precipitation is 42.1 inches, with June being the wettest month (4.7") and February the driest (2.4").