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Weather & Climate in Rio, LA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Rio enjoys a temperate climate with an average annual temperature of 67°F (20°C). Winters average 50°F in January while summers reach 82°F in July. The area gets 313 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 63.9 inches (wetter than the 38-inch national average). Air quality is rated Good with a median AQI of 42. The city sits at an elevation of 101 feet.
Temperature
50°F Jan (10°C)
82°F Jul (28°C)
| Annual Average | 67.3°F |
| 25% above US avg | |
| January Average | 50°F (10°C) |
| July Average | 82°F (28°C) |
| Sunny Days | 313 days/yr |
Geography
| Elevation | 101 ft (31 m) |
| Area | 1.1 sq mi (2.9 km²) |
| Population Density | 192/sq mi |
| Coordinates | 30.6914°N, 89.8896°W |
| Timezone | America/Chicago |
| County | Pearl River County County |
| Nearest Airport | Gulfport-Biloxi International (GPT) 53 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 42.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 86.1 / 100 |
| Social Vulnerability | 76.0 / 100 |
| Community Resilience | 22.9 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively High |
| Earthquake | Very Low |
| Wildfire | Relatively Moderate |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Low |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
| Coastal Flood | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
2 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.0.
| Aug 2, 2010 | 16 km ESE of Clinton, Louisiana | M3.0 | 93 km | 0 km |
| Mar 15, 2025 | 5 km NNE of Magee, Mississippi | M3.0 | 138 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
25 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 4.
| Year | Name | Category | Max Wind | Closest |
| 2024 | Francine | Category 2 | 104 mph | 156 km |
| 2021 | Ida | Category 4 | 150 mph | 88 km |
| 2020 | Zeta | Category 3 | 115 mph | 55 km |
| 2020 | Sally | Category 2 | 109 mph | 210 km |
| 2020 | Delta | Category 1 | 86 mph | 296 km |
| 2019 | Barry | Category 1 | 75 mph | 248 km |
| 2017 | Nate | Category 1 | 86 mph | 91 km |
| 2012 | Isaac | Category 1 | 81 mph | 155 km |
| 2009 | Ida | Category 1 | 86 mph | 269 km |
| 2008 | Gustav | Category 2 | 109 mph | 176 km |
| 2005 | Katrina | Category 4 | 144 mph | 52 km |
| 2005 | Dennis | Category 3 | 127 mph | 248 km |
| 2005 | Cindy | Category 1 | 75 mph | 167 km |
| 2004 | Ivan | Category 4 | 127 mph | 198 km |
| 2002 | Lili | Category 3 | 121 mph | 244 km |
| 1998 | Georges | Category 2 | 109 mph | 95 km |
| 1998 | Earl | Category 2 | 98 mph | 290 km |
| 1997 | Danny | Category 1 | 81 mph | 138 km |
| 1995 | Opal | Category 4 | 127 mph | 260 km |
| 1995 | Erin | Category 2 | 98 mph | 229 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
777 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 50 fatalities, 1,230 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 19, 2020 | EF4 | 43 km | 53.8 mi | 1 |
| Apr 12, 2020 | EF4 | 70 km | 21.2 mi | 4 |
| Apr 12, 2020 | EF4 | 87 km | 67.4 mi | 7 |
| Feb 10, 2013 | EF4 | 77 km | 21.7 mi | 0 |
| Dec 6, 1983 | EF4 | 92 km | 7.0 mi | 0 |
| Apr 18, 1978 | EF4 | 98 km | 19.1 mi | 4 |
| Jan 10, 1975 | EF4 | 82 km | 56.5 mi | 9 |
| Mar 22, 2022 | EF3 | 91 km | 11.5 mi | 1 |
| Apr 12, 2020 | EF3 | 79 km | 83.2 mi | 0 |
| Dec 16, 2019 | EF3 | 83 km | 5.8 mi | 0 |
| Feb 7, 2017 | EF3 | 97 km | 6.4 mi | 0 |
| Feb 7, 2017 | EF3 | 76 km | 10.1 mi | 0 |
| Jan 21, 2017 | EF3 | 67 km | 31.1 mi | 4 |
| Dec 23, 2014 | EF3 | 60 km | 12.5 mi | 3 |
| Dec 25, 2012 | EF3 | 21 km | 60.3 mi | 0 |
| May 26, 2011 | EF3 | 17 km | 6.1 mi | 0 |
| Nov 15, 2006 | EF3 | 77 km | 13.0 mi | 0 |
| Nov 21, 1992 | EF3 | 82 km | 27.0 mi | 0 |
| Aug 25, 1992 | EF3 | 88 km | 9.0 mi | 2 |
| Mar 20, 1983 | EF3 | 34 km | 2.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: WHITE DOG (12,306 acres, 2005).
| Year | Name | Acres Burned | Distance |
| 2005 | WHITE DOG | 12,306 | 87 km |
| 2014 | UNNAMED | 9,932 | 88 km |
| 2013 | UNNAMED | 7,660 | 98 km |
| 2010 | DESOTO 1057 | 7,148 | 99 km |
| 2000 | COW PEN | 6,502 | 86 km |
| 2010 | CRIPPLE CHINOOK | 6,035 | 89 km |
| 2005 | UNNAMED | 5,819 | 95 km |
| 2018 | UNNAMED | 5,803 | 100 km |
| 2010 | DESOTO 1064 | 5,695 | 100 km |
| 1987 | MACHINE GUN | 5,601 | 87 km |
| 1990 | PIERCES CREEK | 5,544 | 88 km |
| 2020 | 369 D | 5,362 | 90 km |
| 2014 | UNNAMED | 5,230 | 88 km |
| 2008 | UNNAMED | 5,097 | 96 km |
| 2008 | UNNAMED | 5,061 | 89 km |
| 2018 | UNNAMED | 4,991 | 93 km |
| 2014 | UNNAMED | 4,899 | 99 km |
| 2010 | DESOTO 1051 | 4,864 | 82 km |
| 2005 | UNNAMED | 4,635 | 98 km |
| 2008 | UNNAMED | 4,563 | 99 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 50°F (10°C) | 5.6 in | Coldest |
| February | 53°F (12°C) | 6.1 in | |
| March | 60°F (15°C) | 6.3 in | Wettest |
| April | 66°F (19°C) | 5.4 in | |
| May | 73°F (23°C) | 5.4 in | |
| June | 79°F (26°C) | 4.9 in | |
| July | 82°F (28°C) | 6.1 in | Warmest |
| August | 81°F (27°C) | 5.7 in | |
| September | 77°F (25°C) | 4.7 in | |
| October | 67°F (19°C) | 3.1 in | Driest |
| November | 58°F (14°C) | 4.8 in | |
| December | 52°F (11°C) | 5.9 in |
Rio has a seasonal temperature swing of 32°F / from 50°F in January to 82°F in July. Total annual precipitation is 64.0 inches, with March being the wettest month (6.3") and October the driest (3.1").