Louisiana weather in September: Statewide normals and every place, NOAA 1991-2020
In September, Louisiana's statewide normal high is 88°F and normal low 67°F; normal highs run from 85°F in Boyce to 90°F in Natchitoches (NOAA 1991-2020 normals).
- Statewide normal high
- 88°FSeptember, 1991-2020
- Statewide normal low
- 67°FSeptember, 1991-2020
- Statewide normal precipitation
- 4.49 inSeptember
- Warmest place
- 90°Fnormal high, Natchitoches
- Coolest place
- 85°Fnormal high, Boyce
Where is Louisiana warmest and wettest in September?
Natchitoches has the warmest September afternoons (90°F) and Boyce the coolest (85°F). Terrytown gets the most precipitation (6.81 in) and Tallulah the least (3.00 in).
Statewide, September averaged 76.9°F in 2021, 77.3°F in 2022, 80.7°F in 2023, 78.0°F in 2024, 78.8°F in 2025, against a 1991-2020 normal of 77.8°F.
| Place | High | Low | Precip. | Snow |
|---|---|---|---|---|
| New Orleans | 88°F | 74°F | 5.11 | 0.0 |
| Baton Rouge | 89°F | 69°F | 4.42 | 0.0 |
| Shreveport | 90°F | 67°F | 3.46 | 0.0 |
| Lafayette | 89°F | 70°F | 5.02 | – |
| Lake Charles | 89°F | 71°F | 5.18 | – |
| Monroe | 89°F | 66°F | 3.55 | – |
| Alexandria | 89°F | 67°F | 3.39 | – |
| Marrero | 87°F | 70°F | 6.34 | – |
| Houma | 89°F | 71°F | 5.77 | 0.0 |
| Slidell | 88°F | 69°F | 4.14 | – |
| New Iberia | 89°F | 70°F | 5.05 | – |
| Terrytown | 89°F | 73°F | 6.81 | 0.0 |
| Hammond | 88°F | 67°F | 4.38 | – |
| Chalmette | 88°F | 73°F | 5.19 | – |
| Ruston | 88°F | 65°F | 3.80 | 0.0 |
| Natchitoches | 90°F | 69°F | 3.90 | 0.0 |
| Thibodaux | 89°F | 71°F | 5.96 | 0.0 |
| Covington | 87°F | 68°F | 4.12 | 0.0 |
| Moss Bluff | 88°F | 68°F | 6.33 | – |
| Crowley | 88°F | 69°F | 4.95 | – |
| Minden | 89°F | 65°F | 3.69 | 0.0 |
| Morgan City | 88°F | 73°F | 5.40 | 0.0 |
| Bogalusa | 89°F | 68°F | 4.72 | 0.0 |
| Jennings | 88°F | 69°F | 5.80 | 0.0 |
| Eunice | 89°F | 68°F | 4.90 | 0.0 |
| Bastrop | 86°F | 64°F | 3.41 | 0.0 |
| Reserve | 88°F | 71°F | 5.75 | 0.0 |
| Donaldsonville | 88°F | 69°F | 5.39 | 0.0 |
| Galliano | 86°F | 72°F | 6.62 | 0.0 |
| Franklin | 87°F | 70°F | 5.59 | 0.0 |
| Tallulah | 88°F | 66°F | 3.00 | – |
| Leesville | 89°F | 65°F | 4.28 | – |
| St. Martinville | 88°F | 68°F | 5.77 | 0.0 |
| Winnsboro | 90°F | 65°F | – | – |
| Jeanerette | 87°F | 69°F | 6.56 | 0.0 |
| Mansfield | 88°F | 65°F | 3.19 | 0.0 |
| New Roads | 89°F | 71°F | 4.06 | 0.0 |
| Jena | 88°F | 65°F | 3.60 | 0.0 |
| Winnfield | 89°F | 64°F | 3.64 | 0.0 |
| Farmerville | 87°F | 66°F | 4.04 | 0.0 |
| Lake Providence | 87°F | 67°F | 3.29 | 0.0 |
| Rayville | 89°F | 67°F | 3.82 | 0.0 |
| Bunkie | 89°F | 66°F | 4.52 | 0.0 |
| Brusly | 88°F | 67°F | 5.25 | – |
| Lake Arthur | 89°F | 70°F | 5.85 | 0.0 |
| Homer | 87°F | 62°F | 3.73 | 0.0 |
| Many | 87°F | 65°F | 3.37 | 0.0 |
| Benton | 88°F | 65°F | 3.67 | – |
| Jonesville | 87°F | 67°F | 4.09 | 0.0 |
| St. Francisville | 89°F | 66°F | – | – |
| Rosepine | 88°F | 66°F | 4.95 | 0.0 |
| Clinton | 87°F | 66°F | 4.30 | 0.0 |
| Oberlin | 87°F | 67°F | 5.06 | 0.0 |
| Boyce | 85°F | 67°F | 4.25 | 0.0 |
| Hackberry | 88°F | 73°F | 5.24 | 0.0 |
| St. Joseph | 90°F | 64°F | 3.56 | 0.0 |
| Grand Coteau | 88°F | 68°F | 5.14 | – |
| Buras | 86°F | 74°F | 6.62 | 0.0 |
| Mooringsport | 89°F | 65°F | 4.12 | 0.0 |
| Boothville | 86°F | 76°F | 4.10 | – |
| Elizabeth | 90°F | 66°F | 5.40 | – |
| Calhoun | 89°F | 63°F | 3.58 | 0.0 |
| Columbia | 88°F | 66°F | 3.57 | 0.0 |
| Ashland | 88°F | 63°F | 3.92 | 0.0 |
| Bienville | 89°F | 65°F | 3.71 | 0.0 |
| Amite | 89°F | 66°F | 3.62 | 0.0 |
| Carville (2 mi SW) | 87°F | 71°F | 4.48 | – |
| De Ridder | 89°F | 67°F | 5.36 | – |
| Fort Polk Fullerton Landing Strip | 89°F | 67°F | 4.25 | – |
| Hodges Gardens | 88°F | 67°F | 4.39 | 0.0 |
| Leland Bowman Lock | 87°F | 69°F | 6.27 | 0.0 |
| Lsu Ben-Hur Farm | 88°F | 68°F | 4.45 | – |
| Lsu Citrus Research Station | 87°F | 73°F | 6.17 | 0.0 |
| Lsu Dean Lee Research Station | 89°F | 66°F | 4.75 | 0.0 |
| Monroe (26 mi N) | 88°F | 62°F | 4.17 | – |
| Peason Ridge Range | 89°F | 66°F | 4.17 | – |
| Red River Research Station | 89°F | 66°F | 3.46 | 0.0 |
| Rockefeller Wildlife Refuge | 88°F | 72°F | 6.01 | 0.0 |
| Salt Point | 88°F | 73°F | – | – |
| St Bernard | 86°F | 71°F | – | – |
| Toledo Bend Lake | 88°F | 68°F | 4.52 | – |
Source: NOAA NCEI nClimDiv statewide normals; NOAA NCEI 1991-2020 monthly normals for each station.