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Weather & Climate in Old Washington, OH
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Old Washington experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 28°F in January while summers reach 73°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 42.4 inches. Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 1,004 feet.
Temperature
28°F Jan (-2°C)
73°F Jul (23°C)
| Annual Average | 51.1°F |
| 5% below US avg | |
| January Average | 28°F (-2°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 1,004 ft (306 m) |
| Area | 0.7 sq mi (1.7 km²) |
| Population Density | 399/sq mi |
| Coordinates | 40.0376°N, 81.4442°W |
| Timezone | America/New_York |
| County | Guernsey County County |
| Nearest Airport | Mid-Ohio Valley Regional (PKB) 48 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 37.5 / 100 |
| Social Vulnerability | 71.0 / 100 |
| Community Resilience | 62.8 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Low |
| Drought | Relatively Low |
| Cold Wave | Very 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: M3.7.
| Mar 12, 2007 | Ohio | M3.7 | 138 km | 5 km |
| Nov 20, 2013 | 2 km SW of Buchtel, Ohio | M3.5 | 93 km | 8 km |
| May 24, 2017 | 1 km S of McArthur, Ohio | M3.4 | 126 km | 10 km |
| Apr 24, 2009 | 7 km ENE of Rio Grande, Ohio | M3.4 | 146 km | 8 km |
| Jun 3, 2017 | 1 km WNW of Batesville, Ohio | M3.4 | 19 km | 2 km |
| Apr 24, 2025 | 3 km S of Pleasant City, Ohio | M3.1 | 20 km | 6 km |
| Aug 31, 2011 | 3 km SE of Lowell, Ohio | M3.1 | 59 km | 5 km |
| Apr 22, 2025 | 3 km ESE of Buffalo, Ohio | M3.1 | 16 km | 5 km |
| Apr 2, 2017 | 5 km W of Graysville, Ohio | M3.0 | 45 km | 4 km |
| Jun 5, 2011 | 5 km W of Lodi, Ohio | M3.0 | 123 km | 5 km |
| Mar 30, 2024 | 2 km SSW of Maple Ridge, Ohio | M3.0 | 101 km | 6 km |
| May 9, 2025 | 3 km S of Pleasant City, Ohio | M2.9 | 21 km | 5 km |
| Aug 7, 2000 | 2 km S of Limaville, Ohio | M2.9 | 105 km | 5 km |
| Apr 29, 2025 | 1 km SE of Pleasant City, Ohio | M2.8 | 18 km | 2 km |
| Feb 3, 2025 | 0 km NE of Reno, Ohio | M2.8 | 74 km | 10 km |
| May 6, 2002 | 3 km SE of Racine, Ohio | M2.8 | 127 km | 5 km |
| Aug 31, 2011 | 2 km NNW of Belmont, West Virginia | M2.8 | 72 km | 5 km |
| Jul 30, 2013 | 12 km SSW of Glenville, West Virginia | M2.8 | 141 km | 13 km |
| May 17, 2010 | 2 km S of Boston Heights, Ohio | M2.7 | 134 km | 5 km |
| Nov 25, 1998 | 1 km SSW of New London, Ohio | M2.7 | 141 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
215 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 6 fatalities, 145 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Oct 1, 1986 | EF3 | 100 km | 1.0 mi | 0 |
| Oct 12, 1978 | EF3 | 96 km | 7.3 mi | 0 |
| May 8, 1969 | EF3 | 36 km | 2.0 mi | 1 |
| Jun 5, 2024 | EF2 | 60 km | 1.3 mi | 0 |
| May 7, 2024 | EF2 | 82 km | 15.3 mi | 0 |
| Feb 28, 2024 | EF2 | 36 km | 4.1 mi | 0 |
| Aug 1, 2022 | EF2 | 77 km | 1.8 mi | 0 |
| Oct 21, 2021 | EF2 | 82 km | 15.7 mi | 0 |
| Jul 29, 2021 | EF2 | 41 km | 2.7 mi | 0 |
| Jul 29, 2021 | EF2 | 76 km | 6.2 mi | 0 |
| Apr 20, 2011 | EF2 | 88 km | 3.9 mi | 0 |
| Sep 16, 2010 | EF2 | 87 km | 7.0 mi | 0 |
| Sep 16, 2010 | EF2 | 93 km | 11.5 mi | 0 |
| Sep 16, 2010 | EF2 | 98 km | 3.3 mi | 0 |
| Jun 22, 2006 | EF2 | 71 km | 6.0 mi | 0 |
| Nov 12, 2003 | EF2 | 46 km | 3.5 mi | 0 |
| Nov 12, 2003 | EF2 | 94 km | 12.0 mi | 0 |
| Jul 10, 2003 | EF2 | 89 km | 2.5 mi | 0 |
| Apr 28, 2002 | EF2 | 91 km | 7.2 mi | 0 |
| May 23, 2000 | EF2 | 47 km | 3.0 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 | 87 km |
| 2021 | LONG RIDGE RX UNIT 1-12 | 1,037 | 88 km |
| 2022 | LONG RIDGE RX UNIT 11-19 | 936 | 89 km |
| 2022 | LONG RIDGE RX UNIT 24 | 709 | 90 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 28°F (-2°C) | 2.2 in | Coldest, Driest |
| February | 30°F (-1°C) | 2.2 in | |
| March | 40°F (5°C) | 3.1 in | |
| April | 50°F (10°C) | 3.3 in | |
| May | 60°F (16°C) | 3.7 in | |
| June | 68°F (20°C) | 3.7 in | |
| July | 73°F (23°C) | 4.1 in | Warmest, Wettest |
| August | 71°F (22°C) | 3.5 in | |
| September | 64°F (18°C) | 2.8 in | |
| October | 53°F (11°C) | 2.4 in | |
| November | 42°F (6°C) | 3.2 in | |
| December | 33°F (0°C) | 2.8 in |
Old Washington has a seasonal temperature swing of 46°F / from 28°F in January to 73°F in July. Total annual precipitation is 36.9 inches, with July being the wettest month (4.1") and January the driest (2.2").