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Weather & Climate in South Vienna, OH
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
South Vienna experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 26°F in January while summers reach 72°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 42.3 inches. Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 1,192 feet.
Temperature
26°F Jan (-3°C)
72°F Jul (22°C)
| Annual Average | 50.4°F |
| 7% below US avg | |
| January Average | 26°F (-3°C) |
| July Average | 72°F (22°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 1,192 ft (363 m) |
| Area | 0.5 sq mi (1.3 km²) |
| Population Density | 794/sq mi |
| Coordinates | 39.9293°N, 83.6139°W |
| Timezone | America/New_York |
| County | Clark County County |
| Nearest Airport | James M Cox Dayton International (DAY) 32 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 77.1 / 100 |
| Social Vulnerability | 58.1 / 100 |
| Community Resilience | 82.4 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively High |
| Drought | Relatively Low |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
16 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 | 91 km | 10 km |
| Nov 20, 2013 | 2 km SW of Buchtel, Ohio | M3.5 | 132 km | 8 km |
| May 24, 2017 | 1 km S of McArthur, Ohio | M3.4 | 125 km | 10 km |
| Feb 3, 2025 | 2 km NNW of Oak Hill, Ohio | M3.1 | 143 km | 26 km |
| Apr 17, 1990 | 8 km NW of Fort Recovery, Ohio | M3.0 | 121 km | 5 km |
| Apr 25, 2020 | 2 km SE of South Shore, Kentucky | M2.9 | 148 km | 27 km |
| Apr 4, 1994 | 2 km WNW of Minster, Ohio | M2.9 | 85 km | 5 km |
| May 12, 2006 | 2 km E of Lima, Ohio | M2.8 | 98 km | 5 km |
| Mar 17, 1999 | 2 km NNE of Ripley, Ohio | M2.8 | 131 km | 0 km |
| May 11, 2015 | 5 km ESE of Maysville, Kentucky | M2.6 | 145 km | 11 km |
| Jun 12, 2015 | 6 km NW of Convoy, Ohio | M2.6 | 150 km | 5 km |
| Jul 23, 2013 | 6 km NNE of Germantown, Kentucky | M2.6 | 139 km | 4 km |
| Feb 11, 2015 | 8 km SE of Richmond Dale, Ohio | M2.6 | 115 km | 20 km |
| Jan 28, 2024 | 3 km SW of Old Washington, Kentucky | M2.5 | 149 km | 15 km |
| Jan 30, 2004 | 2 km S of Rockford, Ohio | M2.5 | 120 km | 5 km |
| Jun 4, 1990 | 4 km SSE of Van Buren, Ohio | M2.5 | 130 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
491 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 56 fatalities, 1,989 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 3, 1974 | EF5 | 50 km | 31.3 mi | 36 |
| May 27, 2019 | EF4 | 73 km | 18.2 mi | 0 |
| Sep 20, 2000 | EF4 | 44 km | 9.0 mi | 1 |
| Apr 11, 1965 | EF4 | 80 km | 18.4 mi | 3 |
| Mar 14, 2024 | EF3 | 81 km | 31.3 mi | 3 |
| May 27, 2019 | EF3 | 46 km | 9.9 mi | 0 |
| May 27, 2019 | EF3 | 73 km | 10.5 mi | 0 |
| May 14, 2014 | EF3 | 34 km | 8.9 mi | 0 |
| Nov 10, 2002 | EF3 | 47 km | 9.0 mi | 0 |
| Oct 13, 1999 | EF3 | 65 km | 3.6 mi | 0 |
| Jun 30, 1993 | EF3 | 81 km | 15.0 mi | 0 |
| Nov 22, 1992 | EF3 | 98 km | 20.0 mi | 0 |
| May 31, 1985 | EF3 | 81 km | 29.0 mi | 1 |
| Jun 13, 1981 | EF3 | 88 km | 3.8 mi | 4 |
| May 10, 1973 | EF3 | 38 km | 89.6 mi | 0 |
| May 24, 1971 | EF3 | 67 km | 1.0 mi | 0 |
| Feb 22, 1971 | EF3 | 59 km | 6.8 mi | 0 |
| Sep 3, 1970 | EF3 | 63 km | 2.3 mi | 0 |
| May 8, 1969 | EF3 | 53 km | 1.9 mi | 0 |
| Nov 16, 1965 | EF3 | 49 km | 3.8 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 26°F (-3°C) | 2.2 in | Coldest, Driest |
| February | 29°F (-2°C) | 2.2 in | |
| March | 39°F (4°C) | 3.2 in | |
| April | 50°F (10°C) | 3.6 in | |
| May | 60°F (16°C) | 4.3 in | Wettest |
| June | 69°F (21°C) | 3.9 in | |
| July | 72°F (22°C) | 4.2 in | Warmest |
| August | 71°F (22°C) | 3.7 in | |
| September | 65°F (18°C) | 3.1 in | |
| October | 53°F (12°C) | 2.6 in | |
| November | 42°F (6°C) | 3.2 in | |
| December | 32°F (-0°C) | 2.9 in |
South Vienna has a seasonal temperature swing of 47°F / from 26°F in January to 72°F in July. Total annual precipitation is 38.9 inches, with May being the wettest month (4.3") and January the driest (2.2").