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Weather & Climate in Triadelphia, WV
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Triadelphia experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 30°F in January while summers reach 74°F in July. The area gets 275 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 41.9 inches. Air quality is rated Good with a median AQI of 39. The city sits at an elevation of 738 feet.
Temperature
30°F Jan (-1°C)
74°F Jul (24°C)
| Annual Average | 53.1°F |
| 2% below US avg | |
| January Average | 30°F (-1°C) |
| July Average | 74°F (24°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 738 ft (225 m) |
| Area | 0.7 sq mi (1.7 km²) |
| Population Density | 1,321/sq mi |
| Coordinates | 40.0432°N, 80.6183°W |
| Timezone | America/New_York |
| County | Ohio County County |
| Nearest Airport | Pittsburgh International (PIT) 37 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 39.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 69.8 / 100 |
| Social Vulnerability | 27.6 / 100 |
| Community Resilience | 94.9 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Very Low |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Low |
| Drought | Very Low |
| Cold Wave | Very Low |
| Landslide | Relatively Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
20 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.4.
| Jun 3, 2017 | 1 km WNW of Batesville, Ohio | M3.4 | 59 km | 2 km |
| Apr 24, 2025 | 3 km S of Pleasant City, Ohio | M3.1 | 81 km | 6 km |
| Apr 22, 2025 | 3 km ESE of Buffalo, Ohio | M3.1 | 76 km | 5 km |
| Aug 31, 2011 | 3 km SE of Lowell, Ohio | M3.1 | 94 km | 5 km |
| Apr 2, 2017 | 5 km W of Graysville, Ohio | M3.0 | 68 km | 4 km |
| Mar 30, 2024 | 2 km SSW of Maple Ridge, Ohio | M3.0 | 102 km | 6 km |
| May 9, 2025 | 3 km S of Pleasant City, Ohio | M2.9 | 81 km | 5 km |
| Aug 7, 2000 | 2 km S of Limaville, Ohio | M2.9 | 111 km | 5 km |
| Apr 29, 2025 | 1 km SE of Pleasant City, Ohio | M2.8 | 79 km | 2 km |
| Feb 3, 2025 | 0 km NE of Reno, Ohio | M2.8 | 99 km | 10 km |
| Aug 31, 2011 | 2 km NNW of Belmont, West Virginia | M2.8 | 91 km | 5 km |
| Jul 30, 2013 | 12 km SSW of Glenville, West Virginia | M2.8 | 136 km | 13 km |
| Jul 20, 2013 | 6 km SW of Glenville, West Virginia | M2.7 | 130 km | 21 km |
| Sep 4, 2011 | 3 km N of Saint Marys, West Virginia | M2.6 | 85 km | 5 km |
| Aug 16, 2013 | 13 km SW of Glenville, West Virginia | M2.6 | 136 km | 6 km |
| Jan 26, 2018 | 7 km NNW of Vincent, Ohio | M2.5 | 116 km | 11 km |
| Apr 29, 2010 | 5 km NNW of Gassaway, West Virginia | M2.5 | 148 km | 5 km |
| Sep 11, 2024 | 4 km WNW of Claysville, Pennsylvania | M2.5 | 17 km | 4 km |
| Aug 15, 2010 | 19 km ESE of Burnsville, West Virginia | M2.5 | 137 km | 17 km |
| Aug 21, 2010 | 19 km WNW of Helvetia, West Virginia | M2.5 | 140 km | 11 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
231 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 17 fatalities, 423 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Oct 1, 1986 | EF3 | 84 km | 1.0 mi | 0 |
| May 31, 1985 | EF3 | 87 km | 39.0 mi | 9 |
| Jun 3, 1980 | EF3 | 84 km | 29.8 mi | 0 |
| Oct 12, 1978 | EF3 | 88 km | 7.3 mi | 0 |
| May 8, 1969 | EF3 | 57 km | 2.0 mi | 1 |
| Aug 3, 1963 | EF3 | 70 km | 0.1 mi | 2 |
| Jun 26, 2024 | EF2 | 90 km | 10.8 mi | 0 |
| May 11, 2024 | EF2 | 54 km | 5.8 mi | 0 |
| May 7, 2024 | EF2 | 62 km | 15.3 mi | 0 |
| Feb 28, 2024 | EF2 | 52 km | 4.1 mi | 0 |
| Aug 25, 2023 | EF2 | 99 km | 2.0 mi | 0 |
| Aug 1, 2022 | EF2 | 7 km | 1.8 mi | 0 |
| Oct 21, 2021 | EF2 | 23 km | 15.7 mi | 0 |
| Jul 29, 2021 | EF2 | 37 km | 2.7 mi | 0 |
| Jul 29, 2021 | EF2 | 72 km | 6.2 mi | 0 |
| Mar 23, 2011 | EF2 | 79 km | 9.0 mi | 0 |
| Nov 12, 2003 | EF2 | 89 km | 3.5 mi | 0 |
| May 23, 2000 | EF2 | 52 km | 3.0 mi | 0 |
| Jun 27, 1998 | EF2 | 70 km | 0.3 mi | 1 |
| Jun 2, 1998 | EF2 | 89 km | 12.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 30°F (-1°C) | 2.6 in | Coldest |
| February | 31°F (-1°C) | 2.4 in | Driest |
| March | 40°F (4°C) | 3.3 in | |
| April | 50°F (10°C) | 3.4 in | |
| May | 59°F (15°C) | 4.1 in | |
| June | 68°F (20°C) | 4.0 in | |
| July | 74°F (24°C) | 4.3 in | Warmest, Wettest |
| August | 70°F (21°C) | 3.5 in | |
| September | 64°F (18°C) | 3.1 in | |
| October | 52°F (11°C) | 2.6 in | |
| November | 43°F (6°C) | 3.2 in | |
| December | 33°F (0°C) | 3.0 in |
Triadelphia has a seasonal temperature swing of 44°F / from 30°F in January to 74°F in July. Total annual precipitation is 39.5 inches, with July being the wettest month (4.3") and February the driest (2.4").