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Weather & Climate in Galliano, LA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Galliano enjoys a temperate climate with an average annual temperature of 69°F (21°C). Winters average 54°F in January while summers reach 82°F in July. The area gets 317 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 66.7 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 7 feet.
Temperature
54°F Jan (12°C)
82°F Jul (28°C)
| Annual Average | 69.4°F |
| 29% above US avg | |
| January Average | 54°F (12°C) |
| July Average | 82°F (28°C) |
| Sunny Days | 317 days/yr |
Geography
| Elevation | 7 ft (2 m) |
| Area | 11.2 sq mi (28.9 km²) |
| Population Density | 589/sq mi |
| Coordinates | 29.4459°N, 90.3077°W |
| Timezone | America/Chicago |
| County | Lafourche Parish County |
| Nearest Airport | Louis Armstrong New Orleans International (MSY) 38 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 42.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 91.4 / 100 |
| Social Vulnerability | 72.4 / 100 |
| Community Resilience | 95.8 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Relatively High |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Low |
| Lightning | Relatively High |
| Ice Storm | Very Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
| Coastal Flood | Relatively Moderate |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Hurricane History
28 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 5.
| Year | Name | Category | Max Wind | Closest |
| 2024 | Francine | Category 2 | 104 mph | 60 km |
| 2021 | Ida | Category 4 | 150 mph | 29 km |
| 2020 | Laura | Category 4 | 150 mph | 282 km |
| 2020 | Zeta | Category 3 | 115 mph | 39 km |
| 2020 | Delta | Category 2 | 98 mph | 261 km |
| 2020 | Sally | Category 2 | 109 mph | 214 km |
| 2019 | Barry | Category 1 | 75 mph | 155 km |
| 2017 | Nate | Category 1 | 92 mph | 114 km |
| 2012 | Isaac | Category 1 | 81 mph | 19 km |
| 2009 | Ida | Category 1 | 86 mph | 189 km |
| 2008 | Gustav | Category 2 | 109 mph | 47 km |
| 2005 | Katrina | Category 5 | 161 mph | 69 km |
| 2005 | Rita | Category 4 | 132 mph | 267 km |
| 2005 | Cindy | Category 1 | 75 mph | 34 km |
| 2004 | Ivan | Category 4 | 132 mph | 213 km |
| 2002 | Lili | Category 4 | 121 mph | 173 km |
| 1998 | Georges | Category 2 | 109 mph | 160 km |
| 1998 | Earl | Category 2 | 98 mph | 188 km |
| 1997 | Danny | Category 1 | 81 mph | 48 km |
| 1995 | Opal | Category 4 | 150 mph | 256 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tornado History
277 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 35 fatalities, 613 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Dec 6, 1983 | EF4 | 72 km | 7.0 mi | 0 |
| Oct 3, 1964 | EF4 | 18 km | 1.5 mi | 22 |
| Mar 22, 2022 | EF3 | 55 km | 11.5 mi | 1 |
| Feb 7, 2017 | EF3 | 70 km | 10.1 mi | 0 |
| Feb 23, 2016 | EF3 | 96 km | 7.8 mi | 0 |
| Aug 25, 1992 | EF3 | 71 km | 9.0 mi | 2 |
| Mar 17, 1970 | EF3 | 100 km | 1.0 mi | 0 |
| Jan 28, 1966 | EF3 | 53 km | 0.1 mi | 0 |
| Mar 21, 1957 | EF3 | 29 km | 2.0 mi | 0 |
| Dec 14, 2022 | EF2 | 51 km | 10.6 mi | 0 |
| Dec 14, 2022 | EF2 | 63 km | 4.7 mi | 1 |
| Jun 6, 2019 | EF2 | 93 km | 1.6 mi | 0 |
| Feb 23, 2016 | EF2 | 92 km | 13.0 mi | 2 |
| Feb 23, 2016 | EF2 | 72 km | 4.7 mi | 0 |
| Feb 13, 2007 | EF2 | 68 km | 1.3 mi | 1 |
| Feb 13, 2007 | EF2 | 53 km | 8.7 mi | 0 |
| Feb 2, 2006 | EF2 | 61 km | 5.5 mi | 0 |
| Apr 6, 2005 | EF2 | 40 km | 2.0 mi | 0 |
| Mar 15, 2000 | EF2 | 43 km | 3.0 mi | 0 |
| Sep 10, 1998 | EF2 | 12 km | 4.0 mi | 1 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
12 wildfires (100+ acres) recorded within 100 km. Largest: UNIT 1 B (2,030 acres, 2000).
| Year | Name | Acres Burned | Distance |
| 2000 | UNIT 1 B | 2,030 | 84 km |
| 1998 | UNIT 7 | 1,623 | 98 km |
| 2011 | BAD ROMANCE | 1,305 | 79 km |
| 2004 | UNITS 1A-1B | 1,108 | 84 km |
| 2010 | UNNAMED | 904 | 66 km |
| 2009 | GOOSEPOINT C | 864 | 100 km |
| 1996 | 1 B | 846 | 82 km |
| 2006 | BOY SCOUT EAST | 826 | 99 km |
| 1998 | UNIT 2 A | 821 | 84 km |
| 1997 | 1 A | 797 | 86 km |
| 2005 | UNT 4A SAMMY SLOUGH | 717 | 100 km |
| 2004 | 12 SOUTH EAST | 542 | 100 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 54°F (12°C) | 4.8 in | Coldest |
| February | 57°F (14°C) | 4.8 in | |
| March | 63°F (17°C) | 4.7 in | |
| April | 68°F (20°C) | 4.1 in | |
| May | 75°F (24°C) | 5.1 in | |
| June | 80°F (27°C) | 5.2 in | |
| July | 82°F (28°C) | 7.2 in | Warmest, Wettest |
| August | 82°F (28°C) | 6.9 in | |
| September | 79°F (26°C) | 6.3 in | |
| October | 71°F (22°C) | 3.4 in | Driest |
| November | 63°F (17°C) | 4.3 in | |
| December | 57°F (14°C) | 4.8 in |
Galliano has a seasonal temperature swing of 29°F / from 54°F in January to 82°F in July. Total annual precipitation is 61.5 inches, with July being the wettest month (7.2") and October the driest (3.4").