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Weather & Climate in West Union, OH
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
West Union experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 28°F in January while summers reach 73°F in July. The area gets 293 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 47.9 inches (wetter than the 38-inch national average). The area receives 17.2 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 873 feet.
Temperature
28°F Jan (-2°C)
73°F Jul (23°C)
| Annual Average | 51.6°F |
| 4% below US avg | |
| January Average | 28°F (-2°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 873 ft (266 m) |
| Area | 2.8 sq mi (7.3 km²) |
| Population Density | 1,001/sq mi |
| Coordinates | 38.7917°N, 83.5441°W |
| Timezone | America/New_York |
| County | Adams County County |
| Nearest Airport | Greater Portsmouth Regional (PMH) 38 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 43.8 / 100 |
| Social Vulnerability | 47.7 / 100 |
| Community Resilience | 22.3 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Low |
| Cold Wave | Very Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
22 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.6.
| Feb 19, 1995 | 8 km SSE of Rocky Fork Point, Ohio | M3.6 | 37 km | 10 km |
| Nov 20, 2013 | 2 km SW of Buchtel, Ohio | M3.5 | 137 km | 8 km |
| Apr 24, 2009 | 7 km ENE of Rio Grande, Ohio | M3.4 | 109 km | 8 km |
| May 24, 2017 | 1 km S of McArthur, Ohio | M3.4 | 104 km | 10 km |
| Sep 8, 1990 | 5 km N of Owingsville, Kentucky | M3.3 | 69 km | 0 km |
| Feb 3, 2025 | 2 km NNW of Oak Hill, Ohio | M3.1 | 85 km | 26 km |
| Apr 25, 2020 | 2 km SE of South Shore, Kentucky | M2.9 | 54 km | 27 km |
| Aug 20, 2015 | 6 km SE of Lawrenceburg, Kentucky | M2.8 | 143 km | 34 km |
| May 6, 2002 | 3 km SE of Racine, Ohio | M2.8 | 144 km | 5 km |
| Mar 17, 1999 | 2 km NNE of Ripley, Ohio | M2.8 | 25 km | 0 km |
| May 11, 2025 | 11 km SE of High Bridge, Kentucky | M2.8 | 148 km | 30 km |
| Aug 4, 2023 | 11 km ENE of Lancaster, Kentucky | M2.6 | 149 km | 17 km |
| May 11, 2015 | 5 km ESE of Maysville, Kentucky | M2.6 | 22 km | 11 km |
| Feb 11, 2015 | 8 km SE of Richmond Dale, Ohio | M2.6 | 80 km | 20 km |
| Mar 8, 2016 | 0 km N of Thurman, Ohio | M2.6 | 96 km | 20 km |
| Jul 23, 2013 | 6 km NNE of Germantown, Kentucky | M2.6 | 36 km | 4 km |
| Jan 28, 2024 | 3 km SW of Old Washington, Kentucky | M2.5 | 33 km | 15 km |
| Sep 27, 2009 | 22 km NNW of Hindman, Kentucky | M2.5 | 147 km | 7 km |
| Mar 20, 2023 | 13 km SSW of Rio Grande, Ohio | M2.5 | 97 km | 6 km |
| Mar 27, 2013 | 3 km W of Apple Grove, West Virginia | M2.5 | 116 km | 15 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
324 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 47 fatalities, 1,210 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 23, 1968 | EF5 | 65 km | 34.0 mi | 7 |
| Mar 2, 2012 | EF4 | 94 km | 9.9 mi | 4 |
| Apr 9, 1999 | EF4 | 86 km | 10.0 mi | 4 |
| Apr 3, 1974 | EF4 | 92 km | 19.8 mi | 2 |
| Apr 23, 1968 | EF4 | 72 km | 24.1 mi | 1 |
| Apr 23, 1968 | EF4 | 73 km | 78.7 mi | 6 |
| Mar 2, 2012 | EF3 | 99 km | 85.0 mi | 10 |
| Mar 2, 2012 | EF3 | 70 km | 20.4 mi | 3 |
| May 10, 2003 | EF3 | 24 km | 25.0 mi | 0 |
| Jul 2, 1997 | EF3 | 56 km | 12.0 mi | 0 |
| Jun 30, 1993 | EF3 | 46 km | 15.0 mi | 0 |
| Apr 3, 1974 | EF3 | 95 km | 4.9 mi | 0 |
| Apr 3, 1974 | EF3 | 6 km | 15.5 mi | 1 |
| Apr 3, 1974 | EF3 | 93 km | 19.3 mi | 0 |
| Aug 9, 1969 | EF3 | 97 km | 22.2 mi | 4 |
| Apr 23, 1968 | EF3 | 52 km | 0.1 mi | 0 |
| May 7, 1967 | EF3 | 25 km | 2.0 mi | 0 |
| Nov 16, 1965 | EF3 | 79 km | 3.8 mi | 0 |
| Apr 8, 1965 | EF3 | 91 km | 6.9 mi | 0 |
| Apr 8, 1965 | EF3 | 50 km | 2.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
8 wildfires (100+ acres) recorded within 100 km. Largest: UNNAMED (3,259 acres, 2009).
| Year | Name | Acres Burned | Distance |
| 2009 | UNNAMED | 3,259 | 30 km |
| 1987 | UNNAMED | 2,559 | 94 km |
| 1987 | UNNAMED | 1,683 | 85 km |
| 2022 | 127 | 1,349 | 82 km |
| 2019 | CY19 BLUEGRASS PRESCRIBED BURN | 1,190 | 89 km |
| 2003 | PEACH ORCHARD | 1,043 | 41 km |
| 2006 | UNNAMED | 619 | 99 km |
| 1999 | UNNAMED | 528 | 90 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 28°F (-2°C) | 2.8 in | Coldest, Driest |
| February | 33°F (0°C) | 2.8 in | |
| March | 43°F (6°C) | 4.1 in | |
| April | 52°F (11°C) | 4.0 in | |
| May | 62°F (16°C) | 4.7 in | Wettest |
| June | 70°F (21°C) | 3.7 in | |
| July | 73°F (23°C) | 4.5 in | Warmest |
| August | 73°F (23°C) | 4.1 in | |
| September | 67°F (19°C) | 3.2 in | |
| October | 55°F (13°C) | 2.8 in | |
| November | 45°F (7°C) | 3.4 in | |
| December | 35°F (2°C) | 3.5 in |
West Union has a seasonal temperature swing of 45°F / from 28°F in January to 73°F in July. Total annual precipitation is 43.6 inches, with May being the wettest month (4.7") and January the driest (2.8").