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Weather & Climate in Bayou L'Ourse, LA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Bayou L'Ourse enjoys a temperate climate with an average annual temperature of 70°F (21°C). Winters average 54°F in January while summers reach 83°F in July. The area gets 314 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 58.5 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 4 feet.
Temperature
54°F Jan (12°C)
83°F Jul (29°C)
| Annual Average | 70.1°F |
| 30% above US avg | |
| January Average | 54°F (12°C) |
| July Average | 83°F (29°C) |
| Sunny Days | 314 days/yr |
Geography
| Elevation | 4 ft (1 m) |
| Area | 2.7 sq mi (7.0 km²) |
| Population Density | 808/sq mi |
| Coordinates | 29.7174°N, 91.0606°W |
| Timezone | America/Chicago |
| County | Assumption Parish County |
| Nearest Airport | Louis Armstrong New Orleans International (MSY) 52 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 42.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 70.3 / 100 |
| Social Vulnerability | 85.2 / 100 |
| Community Resilience | 53.2 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively High |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Very Low |
| Lightning | Relatively Low |
| Ice Storm | Very Low |
| Drought | Relatively High |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
| Coastal Flood | Relatively Moderate |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
1 earthquake (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.0.
| Aug 2, 2010 | 16 km ESE of Clinton, Louisiana | M3.0 | 124 km | 0 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
27 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 | 20 km |
| 2021 | Ida | Category 4 | 150 mph | 49 km |
| 2020 | Laura | Category 4 | 150 mph | 216 km |
| 2020 | Zeta | Category 3 | 115 mph | 73 km |
| 2020 | Delta | Category 3 | 115 mph | 182 km |
| 2020 | Sally | Category 2 | 86 mph | 287 km |
| 2019 | Barry | Category 1 | 75 mph | 94 km |
| 2017 | Nate | Category 1 | 92 mph | 181 km |
| 2012 | Isaac | Category 1 | 81 mph | 65 km |
| 2009 | Ida | Category 1 | 86 mph | 266 km |
| 2008 | Gustav | Category 2 | 109 mph | 34 km |
| 2007 | Humberto | Category 1 | 75 mph | 253 km |
| 2005 | Katrina | Category 5 | 161 mph | 143 km |
| 2005 | Rita | Category 4 | 132 mph | 226 km |
| 2005 | Cindy | Category 1 | 75 mph | 109 km |
| 2004 | Ivan | Category 4 | 132 mph | 292 km |
| 2002 | Lili | Category 4 | 121 mph | 113 km |
| 1998 | Georges | Category 2 | 109 mph | 221 km |
| 1998 | Earl | Category 1 | 81 mph | 262 km |
| 1997 | Danny | Category 1 | 81 mph | 126 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
386 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 39 fatalities, 731 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Dec 6, 1983 | EF4 | 65 km | 7.0 mi | 0 |
| Oct 3, 1964 | EF4 | 68 km | 1.5 mi | 22 |
| Mar 22, 2022 | EF3 | 99 km | 11.5 mi | 1 |
| Feb 23, 2016 | EF3 | 30 km | 7.8 mi | 0 |
| Aug 25, 1992 | EF3 | 71 km | 9.0 mi | 2 |
| Apr 26, 1973 | EF3 | 87 km | 0.3 mi | 0 |
| Feb 29, 1972 | EF3 | 95 km | 1.0 mi | 0 |
| Sep 16, 1971 | EF3 | 82 km | 7.3 mi | 0 |
| Mar 17, 1970 | EF3 | 23 km | 1.0 mi | 0 |
| Dec 25, 1969 | EF3 | 54 km | 13.5 mi | 0 |
| Apr 12, 1969 | EF3 | 56 km | 10.7 mi | 0 |
| Jan 28, 1966 | EF3 | 75 km | 0.1 mi | 0 |
| Mar 21, 1957 | EF3 | 51 km | 2.0 mi | 0 |
| Feb 6, 1953 | EF3 | 92 km | 15.6 mi | 2 |
| Dec 14, 2022 | EF2 | 62 km | 4.7 mi | 1 |
| Dec 14, 2022 | EF2 | 92 km | 10.6 mi | 0 |
| Dec 14, 2022 | EF2 | 80 km | 5.2 mi | 0 |
| Jun 6, 2019 | EF2 | 57 km | 1.6 mi | 0 |
| Feb 7, 2017 | EF2 | 81 km | 23.1 mi | 0 |
| Feb 23, 2016 | EF2 | 37 km | 13.0 mi | 2 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
1 wildfire (100+ acres) recorded within 100 km. Largest: UNNAMED (904 acres, 2010).
| Year | Name | Acres Burned | Distance |
| 2010 | UNNAMED | 904 | 78 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 54°F (12°C) | 5.3 in | Coldest |
| February | 55°F (13°C) | 4.8 in | |
| March | 62°F (16°C) | 4.7 in | |
| April | 67°F (20°C) | 4.5 in | |
| May | 74°F (24°C) | 5.2 in | |
| June | 79°F (26°C) | 6.1 in | |
| July | 83°F (29°C) | 7.8 in | Warmest, Wettest |
| August | 81°F (27°C) | 7.2 in | |
| September | 78°F (26°C) | 6.3 in | |
| October | 69°F (21°C) | 3.8 in | Driest |
| November | 61°F (16°C) | 4.4 in | |
| December | 55°F (13°C) | 5.0 in |
Bayou L'Ourse has a seasonal temperature swing of 29°F / from 54°F in January to 83°F in July. Total annual precipitation is 64.9 inches, with July being the wettest month (7.8") and October the driest (3.8").