Weather & Climate in Ossun, LA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Ossun enjoys a temperate climate with an average annual temperature of 69°F (21°C). Winters average 53°F in January while summers reach 83°F in July. Annual precipitation totals 62.8 inches (wetter than the 38-inch national average). Air quality is rated Moderate with a median AQI of 51. 49% of days have good air quality. The city sits at an elevation of 40 feet.
Temperature
53°F Jan (12°C)
83°F Jul (29°C)
| Annual Average | 69.4°F |
| 29% above US avg | |
| January Average | 53°F (12°C) |
| July Average | 83°F (29°C) |
Geography
| Elevation | 40 ft (12 m) |
| Area | 3.4 sq mi (8.8 km²) |
| Population Density | 572/sq mi |
| Coordinates | 30.2834°N, 92.1070°W |
| Timezone | America/Chicago |
| County | Lafayette Parish County |
| Nearest Airport | Lafayette Regional/Paul Fournet Field (LFT) 9 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 51.0 |
| Rating | Moderate |
| Good Days % | 49.3% |
| Unhealthy Days | 2 |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 95.2 / 100 |
| Social Vulnerability | 32.4 / 100 |
| Community Resilience | 72.8 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very High |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Low |
| Lightning | Very High |
| Ice Storm | Relatively High |
| Drought | Relatively Moderate |
| Cold Wave | Relatively High |
| Landslide | Very Low |
| Coastal Flood | Relatively 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 | 134 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 | 134 km |
| 2021 | Ida | Category 4 | 150 mph | 130 km |
| 2020 | Laura | Category 4 | 150 mph | 126 km |
| 2020 | Zeta | Category 3 | 115 mph | 189 km |
| 2020 | Delta | Category 2 | 104 mph | 79 km |
| 2019 | Barry | Category 1 | 75 mph | 77 km |
| 2017 | Nate | Category 1 | 86 mph | 283 km |
| 2012 | Isaac | Category 1 | 81 mph | 184 km |
| 2008 | Ike | Category 2 | 109 mph | 273 km |
| 2008 | Gustav | Category 2 | 109 mph | 20 km |
| 2007 | Humberto | Category 1 | 92 mph | 143 km |
| 2005 | Katrina | Category 4 | 144 mph | 241 km |
| 2005 | Rita | Category 3 | 127 mph | 167 km |
| 2005 | Cindy | Category 1 | 75 mph | 228 km |
| 2002 | Lili | Category 3 | 121 mph | 37 km |
| 1997 | Danny | Category 1 | 81 mph | 245 km |
| 1992 | Andrew | Category 4 | 144 mph | 44 km |
| 1989 | Chantal | Category 1 | 81 mph | 218 km |
| 1988 | Florence | Category 1 | 81 mph | 283 km |
| 1986 | Bonnie | Category 1 | 86 mph | 210 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tornado History
586 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 35 fatalities, 599 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 10, 2021 | EF3 | 45 km | 8.7 mi | 1 |
| May 17, 2020 | EF3 | 25 km | 3.9 mi | 1 |
| Nov 21, 1992 | EF3 | 89 km | 6.0 mi | 0 |
| May 20, 1983 | EF3 | 73 km | 2.0 mi | 0 |
| Feb 9, 1983 | EF3 | 15 km | 21.0 mi | 0 |
| Feb 9, 1983 | EF3 | 27 km | 3.0 mi | 0 |
| Jan 31, 1983 | EF3 | 72 km | 5.0 mi | 1 |
| Jan 31, 1983 | EF3 | 33 km | 6.0 mi | 1 |
| Apr 21, 1977 | EF3 | 15 km | 3.8 mi | 1 |
| Oct 29, 1974 | EF3 | 59 km | 31.3 mi | 2 |
| Oct 29, 1974 | EF3 | 12 km | 7.3 mi | 0 |
| Feb 29, 1972 | EF3 | 75 km | 1.0 mi | 0 |
| Dec 25, 1969 | EF3 | 35 km | 1.5 mi | 1 |
| Dec 25, 1969 | EF3 | 75 km | 13.5 mi | 0 |
| May 1, 1967 | EF3 | 90 km | 5.2 mi | 0 |
| Sep 10, 1961 | EF3 | 37 km | 5.7 mi | 1 |
| Nov 7, 1957 | EF3 | 86 km | 3.6 mi | 0 |
| Nov 7, 1957 | EF3 | 12 km | 9.2 mi | 4 |
| Oct 15, 1957 | EF3 | 21 km | 37.9 mi | 1 |
| Apr 4, 1952 | EF3 | 74 km | 36.7 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: LACASSINE POOL (16,640 acres, 2005).
| Year | Name | Acres Burned | Distance |
| 2005 | LACASSINE POOL | 16,640 | 85 km |
| 2000 | UNNAMED | 12,496 | 73 km |
| 2006 | UNNAMED | 8,563 | 80 km |
| 2005 | UNNAMED | 6,588 | 81 km |
| 2005 | UNNAMED | 4,928 | 94 km |
| 1995 | UNNAMED | 4,875 | 68 km |
| 2003 | UNNAMED | 4,872 | 88 km |
| 1996 | UNNAMED | 4,678 | 94 km |
| 2002 | G 1 2 3 | 3,427 | 86 km |
| 2005 | UNNAMED | 3,157 | 89 km |
| 2002 | H I J | 3,155 | 85 km |
| 2005 | UNNAMED | 3,143 | 97 km |
| 2003 | UNNAMED | 2,853 | 86 km |
| 1996 | UNNAMED | 2,685 | 82 km |
| 1999 | UNIT F 3 | 2,667 | 86 km |
| 1995 | E 2 | 2,567 | 91 km |
| 2000 | UNNAMED | 2,552 | 96 km |
| 2003 | UNNAMED | 2,543 | 99 km |
| 2015 | LALCR FY16 RX MARSH AND PRAIRIE | 2,413 | 85 km |
| 2017 | UNNAMED | 2,235 | 96 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 53°F (12°C) | 5.9 in | Coldest |
| February | 57°F (14°C) | 4.1 in | |
| March | 63°F (17°C) | 3.7 in | Driest |
| April | 69°F (21°C) | 4.9 in | |
| May | 77°F (25°C) | 5.4 in | |
| June | 82°F (28°C) | 7.1 in | Wettest |
| July | 83°F (29°C) | 6.3 in | |
| August | 84°F (29°C) | 6.3 in | Warmest |
| September | 80°F (27°C) | 5.0 in | |
| October | 71°F (22°C) | 4.8 in | |
| November | 61°F (16°C) | 4.4 in | |
| December | 55°F (13°C) | 5.0 in |
Ossun has a seasonal temperature swing of 31°F / from 53°F in January to 84°F in August. Total annual precipitation is 62.8 inches, with June being the wettest month (7.1") and March the driest (3.7").