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Weather & Climate in South Bloomfield, OH
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
South Bloomfield experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 31°F in January while summers reach 75°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 40.9 inches. The area receives 15.4 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 682 feet.
Temperature
31°F Jan (-1°C)
75°F Jul (24°C)
| Annual Average | 54.3°F |
| 1% above US avg | |
| January Average | 31°F (-1°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 682 ft (208 m) |
| Area | 4.0 sq mi (10.4 km²) |
| Population Density | 702/sq mi |
| Coordinates | 39.7170°N, 82.9933°W |
| Timezone | America/New_York |
| County | Fairfield County County |
| Nearest Airport | Rickenbacker International (LCK) 8 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 72.6 / 100 |
| Social Vulnerability | 16.0 / 100 |
| Community Resilience | 86.5 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively High |
| Ice Storm | Relatively High |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
27 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 | 78 km | 10 km |
| Nov 20, 2013 | 2 km SW of Buchtel, Ohio | M3.5 | 74 km | 8 km |
| Jun 3, 2017 | 1 km WNW of Batesville, Ohio | M3.4 | 147 km | 2 km |
| May 24, 2017 | 1 km S of McArthur, Ohio | M3.4 | 70 km | 10 km |
| Apr 24, 2009 | 7 km ENE of Rio Grande, Ohio | M3.4 | 109 km | 8 km |
| Apr 24, 2025 | 3 km S of Pleasant City, Ohio | M3.1 | 125 km | 6 km |
| Apr 22, 2025 | 3 km ESE of Buffalo, Ohio | M3.1 | 131 km | 5 km |
| Feb 3, 2025 | 2 km NNW of Oak Hill, Ohio | M3.1 | 96 km | 26 km |
| Aug 31, 2011 | 3 km SE of Lowell, Ohio | M3.1 | 133 km | 5 km |
| Apr 2, 2017 | 5 km W of Graysville, Ohio | M3.0 | 150 km | 4 km |
| Apr 25, 2020 | 2 km SE of South Shore, Kentucky | M2.9 | 112 km | 27 km |
| May 9, 2025 | 3 km S of Pleasant City, Ohio | M2.9 | 125 km | 5 km |
| Apr 4, 1994 | 2 km WNW of Minster, Ohio | M2.9 | 142 km | 5 km |
| Feb 3, 2025 | 0 km NE of Reno, Ohio | M2.8 | 143 km | 10 km |
| May 6, 2002 | 3 km SE of Racine, Ohio | M2.8 | 128 km | 5 km |
| Apr 29, 2025 | 1 km SE of Pleasant City, Ohio | M2.8 | 127 km | 2 km |
| Mar 17, 1999 | 2 km NNE of Ripley, Ohio | M2.8 | 129 km | 0 km |
| May 12, 2006 | 2 km E of Lima, Ohio | M2.8 | 147 km | 5 km |
| May 11, 2015 | 5 km ESE of Maysville, Kentucky | M2.6 | 135 km | 11 km |
| Mar 8, 2016 | 0 km N of Thurman, Ohio | M2.6 | 102 km | 20 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
402 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 49 fatalities, 1,652 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 3, 1974 | EF5 | 91 km | 31.3 mi | 36 |
| Sep 20, 2000 | EF4 | 85 km | 9.0 mi | 1 |
| May 27, 2019 | EF3 | 96 km | 9.9 mi | 0 |
| May 14, 2014 | EF3 | 73 km | 8.9 mi | 0 |
| Nov 10, 2002 | EF3 | 85 km | 9.0 mi | 0 |
| Oct 13, 1999 | EF3 | 13 km | 3.6 mi | 0 |
| Jun 30, 1993 | EF3 | 79 km | 15.0 mi | 0 |
| May 31, 1985 | EF3 | 56 km | 29.0 mi | 1 |
| Jun 13, 1981 | EF3 | 87 km | 3.8 mi | 4 |
| May 10, 1973 | EF3 | 91 km | 89.6 mi | 0 |
| Feb 22, 1971 | EF3 | 29 km | 6.8 mi | 0 |
| Sep 3, 1970 | EF3 | 8 km | 2.3 mi | 0 |
| May 8, 1969 | EF3 | 97 km | 1.9 mi | 0 |
| Nov 16, 1965 | EF3 | 48 km | 3.8 mi | 0 |
| Apr 8, 1965 | EF3 | 94 km | 2.0 mi | 0 |
| Feb 10, 1959 | EF3 | 93 km | 10.5 mi | 0 |
| Jun 5, 2024 | EF2 | 86 km | 1.3 mi | 0 |
| Apr 2, 2024 | EF2 | 73 km | 1.9 mi | 0 |
| Mar 14, 2024 | EF2 | 86 km | 19.5 mi | 0 |
| Feb 28, 2024 | EF2 | 70 km | 21.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
4 wildfires (100+ acres) recorded within 100 km. Largest: LONG RIDGE RX UNIT 37-38 (1,050 acres, 2022).
| Year | Name | Acres Burned | Distance |
| 2022 | LONG RIDGE RX UNIT 37-38 | 1,050 | 78 km |
| 2021 | LONG RIDGE RX UNIT 1-12 | 1,037 | 74 km |
| 2022 | LONG RIDGE RX UNIT 11-19 | 936 | 74 km |
| 2022 | LONG RIDGE RX UNIT 24 | 709 | 79 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 31°F (-1°C) | 2.3 in | |
| February | 31°F (-1°C) | 2.2 in | Coldest, Driest |
| March | 41°F (5°C) | 3.0 in | |
| April | 51°F (11°C) | 3.4 in | |
| May | 62°F (16°C) | 4.3 in | Wettest |
| June | 70°F (21°C) | 3.8 in | |
| July | 75°F (24°C) | 4.1 in | Warmest |
| August | 72°F (22°C) | 3.8 in | |
| September | 66°F (19°C) | 3.0 in | |
| October | 54°F (12°C) | 2.4 in | |
| November | 43°F (6°C) | 3.1 in | |
| December | 33°F (1°C) | 2.8 in |
South Bloomfield has a seasonal temperature swing of 45°F / from 31°F in February to 75°F in July. Total annual precipitation is 38.1 inches, with May being the wettest month (4.3") and February the driest (2.2").