All Countries
Weather & Climate in Port Allen, LA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Port Allen enjoys a temperate climate with an average annual temperature of 67°F (20°C). Winters average 51°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 64.5 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 25 feet.
Temperature
51°F Jan (10°C)
82°F Jul (28°C)
| Annual Average | 67.3°F |
| 25% above US avg | |
| January Average | 51°F (10°C) |
| July Average | 82°F (28°C) |
| Sunny Days | 313 days/yr |
Geography
| Elevation | 25 ft (8 m) |
| Area | 1.3 sq mi (3.3 km²) |
| Population Density | 1,735/sq mi |
| Coordinates | 30.4438°N, 91.2074°W |
| Timezone | America/Chicago |
| County | West Baton Rouge Parish County |
| Nearest Airport | Acadiana Regional (ARA) 49 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 42.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 31.8 / 100 |
| Social Vulnerability | 12.8 / 100 |
| Community Resilience | 79.6 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively Moderate |
| 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 | 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
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 | 53 km | 0 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
23 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 | 98 km |
| 2021 | Ida | Category 4 | 150 mph | 43 km |
| 2020 | Laura | Category 4 | 150 mph | 210 km |
| 2020 | Zeta | Category 3 | 115 mph | 128 km |
| 2020 | Delta | Category 2 | 104 mph | 167 km |
| 2019 | Barry | Category 1 | 75 mph | 134 km |
| 2017 | Nate | Category 1 | 86 mph | 202 km |
| 2012 | Isaac | Category 1 | 81 mph | 135 km |
| 2008 | Gustav | Category 2 | 109 mph | 68 km |
| 2007 | Humberto | Category 1 | 92 mph | 230 km |
| 2005 | Katrina | Category 4 | 144 mph | 155 km |
| 2005 | Rita | Category 3 | 127 mph | 254 km |
| 2005 | Cindy | Category 1 | 75 mph | 175 km |
| 2002 | Lili | Category 3 | 121 mph | 116 km |
| 1998 | Georges | Category 2 | 109 mph | 221 km |
| 1997 | Danny | Category 1 | 81 mph | 187 km |
| 1992 | Andrew | Category 4 | 144 mph | 48 km |
| 1989 | Chantal | Category 1 | 81 mph | 295 km |
| 1988 | Florence | Category 1 | 81 mph | 216 km |
| 1986 | Bonnie | Category 1 | 86 mph | 288 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
581 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 32 fatalities, 726 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Dec 6, 1983 | EF4 | 78 km | 7.0 mi | 0 |
| Apr 10, 2021 | EF3 | 76 km | 8.7 mi | 1 |
| Dec 16, 2019 | EF3 | 89 km | 29.3 mi | 0 |
| Feb 7, 2017 | EF3 | 35 km | 6.4 mi | 0 |
| Feb 23, 2016 | EF3 | 52 km | 7.8 mi | 0 |
| Aug 25, 1992 | EF3 | 84 km | 9.0 mi | 2 |
| Oct 14, 1984 | EF3 | 24 km | 16.0 mi | 0 |
| May 20, 1983 | EF3 | 87 km | 2.0 mi | 0 |
| Feb 9, 1983 | EF3 | 93 km | 21.0 mi | 0 |
| Dec 13, 1977 | EF3 | 83 km | 20.4 mi | 0 |
| Apr 21, 1977 | EF3 | 73 km | 3.8 mi | 1 |
| Oct 29, 1974 | EF3 | 88 km | 7.3 mi | 0 |
| Apr 26, 1973 | EF3 | 14 km | 0.3 mi | 0 |
| Feb 29, 1972 | EF3 | 19 km | 1.0 mi | 0 |
| Sep 16, 1971 | EF3 | 17 km | 7.3 mi | 0 |
| Mar 17, 1970 | EF3 | 83 km | 1.0 mi | 0 |
| Dec 25, 1969 | EF3 | 38 km | 13.5 mi | 0 |
| Apr 12, 1969 | EF3 | 40 km | 10.7 mi | 0 |
| Nov 7, 1957 | EF3 | 75 km | 3.6 mi | 0 |
| Nov 7, 1957 | EF3 | 96 km | 9.2 mi | 4 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: UNNAMED (4,022 acres, 2014).
| Year | Name | Acres Burned | Distance |
| 2014 | UNNAMED | 4,022 | 92 km |
| 2014 | UNNAMED | 2,666 | 96 km |
| 2024 | HOMOCHITTO BB28 SUB3 RX | 2,279 | 92 km |
| 2016 | UNNAMED | 2,229 | 95 km |
| 2021 | HOMOCHITTO BB26 | 2,008 | 96 km |
| 2010 | BURN BLOCK 14 | 1,502 | 100 km |
| 2022 | HOMOCHITTO BB 36N | 1,357 | 96 km |
| 2018 | UNNAMED | 1,218 | 93 km |
| 2006 | UNNAMED | 1,206 | 92 km |
| 2024 | HOMOCHITTO 36 N RX | 1,194 | 96 km |
| 2016 | UNNAMED | 1,174 | 97 km |
| 2024 | HOMOCHITTO BB 35 RX | 1,173 | 93 km |
| 2024 | HOMOCHITTO BB39 S2 RX | 1,129 | 93 km |
| 2019 | HOMOCHITTO RX BB 65 SUB 2 | 1,118 | 96 km |
| 2013 | UNNAMED | 1,108 | 96 km |
| 2022 | HOMOCHITTO BB 35 | 1,091 | 93 km |
| 2021 | HOMOCHITTO - BB 65 | 1,039 | 96 km |
| 2022 | HOMOCHITTO BB 65N | 977 | 98 km |
| 2024 | HOMOCHITTO BB 65 SUB3 RX | 956 | 98 km |
| 2014 | UNNAMED | 956 | 92 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 51°F (10°C) | 5.8 in | Coldest |
| February | 54°F (12°C) | 5.0 in | |
| March | 60°F (16°C) | 5.0 in | |
| April | 67°F (19°C) | 5.2 in | |
| May | 74°F (24°C) | 5.2 in | |
| June | 80°F (27°C) | 5.2 in | |
| July | 82°F (28°C) | 6.2 in | Warmest, Wettest |
| August | 82°F (28°C) | 5.9 in | |
| September | 78°F (25°C) | 5.1 in | |
| October | 68°F (20°C) | 3.9 in | Driest |
| November | 59°F (15°C) | 4.5 in | |
| December | 53°F (12°C) | 5.4 in |
Port Allen has a seasonal temperature swing of 31°F / from 51°F in January to 82°F in July. Total annual precipitation is 62.4 inches, with July being the wettest month (6.2") and October the driest (3.9").