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Weather & Climate in Rio Grande, OH
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Rio Grande experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 32°F in January while summers reach 76°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 44.5 inches. Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 652 feet.
Temperature
32°F Jan (0°C)
76°F Jul (24°C)
| Annual Average | 54.9°F |
| 2% above US avg | |
| January Average | 32°F (0°C) |
| July Average | 76°F (24°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 652 ft (199 m) |
| Area | 1.4 sq mi (3.5 km²) |
| Population Density | 586/sq mi |
| Coordinates | 38.8802°N, 82.3794°W |
| Timezone | America/New_York |
| County | Gallia County County |
| Nearest Airport | Greater Portsmouth Regional (PMH) 25 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 48.3 / 100 |
| Social Vulnerability | 75.9 / 100 |
| Community Resilience | 36.0 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Low |
| Cold Wave | Very Low |
| Landslide | Relatively Moderate |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
44 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 | 98 km | 10 km |
| Nov 20, 2013 | 2 km SW of Buchtel, Ohio | M3.5 | 65 km | 8 km |
| Mar 31, 2013 | West Virginia | M3.4 | 137 km | 8 km |
| Apr 24, 2009 | 7 km ENE of Rio Grande, Ohio | M3.4 | 7 km | 8 km |
| Jun 3, 2017 | 1 km WNW of Batesville, Ohio | M3.4 | 148 km | 2 km |
| May 24, 2017 | 1 km S of McArthur, Ohio | M3.4 | 40 km | 10 km |
| Apr 4, 2010 | 14 km SW of Gassaway, West Virginia | M3.4 | 131 km | 0 km |
| Sep 8, 1990 | 5 km N of Owingsville, Kentucky | M3.3 | 143 km | 0 km |
| Feb 3, 2025 | 2 km NNW of Oak Hill, Ohio | M3.1 | 18 km | 26 km |
| Aug 31, 2011 | 3 km SE of Lowell, Ohio | M3.1 | 105 km | 5 km |
| Apr 22, 2025 | 3 km ESE of Buffalo, Ohio | M3.1 | 137 km | 5 km |
| Apr 24, 2025 | 3 km S of Pleasant City, Ohio | M3.1 | 132 km | 6 km |
| Apr 2, 2017 | 5 km W of Graysville, Ohio | M3.0 | 131 km | 4 km |
| Jun 28, 1991 | 4 km ENE of Pratt, West Virginia | M3.0 | 116 km | 7 km |
| Apr 25, 2020 | 2 km SE of South Shore, Kentucky | M2.9 | 52 km | 27 km |
| May 9, 2025 | 3 km S of Pleasant City, Ohio | M2.9 | 131 km | 5 km |
| Mar 17, 1999 | 2 km NNE of Ripley, Ohio | M2.8 | 127 km | 0 km |
| Feb 3, 2025 | 0 km NE of Reno, Ohio | M2.8 | 102 km | 10 km |
| Apr 29, 2025 | 1 km SE of Pleasant City, Ohio | M2.8 | 134 km | 2 km |
| Aug 31, 2011 | 2 km NNW of Belmont, West Virginia | M2.8 | 112 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
186 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 9 fatalities, 196 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 23, 1968 | EF5 | 42 km | 34.0 mi | 7 |
| Sep 16, 2010 | EF3 | 60 km | 9.1 mi | 1 |
| Oct 13, 1999 | EF3 | 95 km | 3.6 mi | 0 |
| Sep 3, 1970 | EF3 | 100 km | 2.3 mi | 0 |
| Apr 23, 1968 | EF3 | 53 km | 0.1 mi | 0 |
| Apr 8, 1965 | EF3 | 61 km | 6.9 mi | 0 |
| Apr 8, 1965 | EF3 | 52 km | 2.0 mi | 0 |
| Apr 2, 2024 | EF2 | 38 km | 1.9 mi | 0 |
| Apr 2, 2024 | EF2 | 74 km | 1.1 mi | 0 |
| Apr 2, 2024 | EF2 | 70 km | 8.0 mi | 0 |
| Jun 8, 2022 | EF2 | 63 km | 9.1 mi | 0 |
| Oct 15, 2021 | EF2 | 95 km | 0.9 mi | 0 |
| May 27, 2019 | EF2 | 77 km | 5.3 mi | 0 |
| Jul 4, 2016 | EF2 | 89 km | 2.6 mi | 0 |
| Mar 2, 2012 | EF2 | 99 km | 11.1 mi | 1 |
| Sep 16, 2010 | EF2 | 60 km | 3.3 mi | 0 |
| Sep 16, 2010 | EF2 | 98 km | 7.0 mi | 0 |
| Jul 10, 2003 | EF2 | 75 km | 2.5 mi | 0 |
| May 8, 2002 | EF2 | 3 km | 3.0 mi | 0 |
| Jun 15, 2000 | EF2 | 15 km | 2.5 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: MILL CREEK ROAD (7,029 acres, 1987).
| Year | Name | Acres Burned | Distance |
| 1987 | MILL CREEK ROAD | 7,029 | 96 km |
| 1987 | PLUM BRANCH | 6,223 | 86 km |
| 1991 | PRICHARD | 5,220 | 75 km |
| 1987 | BULL CREEK | 5,080 | 93 km |
| 1999 | THOMPSON BRANCH | 4,145 | 97 km |
| 1987 | LENS CREEK | 3,609 | 99 km |
| 1999 | UNNAMED | 3,373 | 97 km |
| 2009 | UNNAMED | 3,259 | 76 km |
| 1999 | BRUCHY CREEK | 3,155 | 98 km |
| 1991 | DUNLOW | 3,074 | 93 km |
| 1987 | UNNAMED | 2,559 | 95 km |
| 1987 | UNNAMED | 2,302 | 80 km |
| 2022 | RIGHT SIDE OF RIDGEVIEW HOLLOW | 1,871 | 98 km |
| 1987 | UNNAMED | 1,772 | 100 km |
| 1987 | KIAHS CREEK | 1,770 | 93 km |
| 1987 | TRACE BRANCH | 1,760 | 90 km |
| 1991 | DOG HOLLOW | 1,686 | 96 km |
| 1987 | LITTLE HARTS | 1,578 | 97 km |
| 1987 | LITTLE COAL RIVER | 1,565 | 88 km |
| 1995 | RUMBLE | 1,494 | 97 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 32°F (0°C) | 2.6 in | Coldest, Driest |
| February | 33°F (0°C) | 2.8 in | |
| March | 43°F (6°C) | 3.7 in | |
| April | 52°F (11°C) | 3.7 in | |
| May | 62°F (16°C) | 4.2 in | |
| June | 70°F (21°C) | 3.6 in | |
| July | 76°F (24°C) | 4.7 in | Warmest, Wettest |
| August | 73°F (23°C) | 4.0 in | |
| September | 66°F (19°C) | 3.2 in | |
| October | 55°F (13°C) | 2.8 in | |
| November | 44°F (7°C) | 3.2 in | |
| December | 35°F (2°C) | 3.2 in |
Rio Grande has a seasonal temperature swing of 44°F / from 32°F in January to 76°F in July. Total annual precipitation is 41.7 inches, with July being the wettest month (4.7") and January the driest (2.6").