Click on a day for an hourly weather forecast
The weather in Baton Rouge in September is hot. The average temperatures are between 21°C and 31°C.
You can expect rain for roughly half of the month of September in Baton Rouge. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Baton Rouge in September 2025.
If you’re planning to visit Baton Rouge in the near future, we highly recommend that you review the 14 day weather forecast for Baton Rouge before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 15° / 7° | 5 | 26 | 0 | 77 mm | Good | Baton Rouge in January |
| February | 18° / 9° | 5 | 24 | 0 | 70 mm | Good | Baton Rouge in February |
| March | 22° / 12° | 5 | 26 | 0 | 75 mm | Good | Baton Rouge in March |
| April | 26° / 15° | 5 | 25 | 0 | 78 mm | Perfect | Baton Rouge in April |
| May | 30° / 19° | 7 | 24 | 0 | 102 mm | Ok | Baton Rouge in May |
| June | 32° / 22° | 11 | 19 | 0 | 134 mm | Ok | Baton Rouge in June |
| July | 33° / 23° | 14 | 17 | 0 | 181 mm | Ok | Baton Rouge in July |
| August | 33° / 24° | 14 | 17 | 0 | 197 mm | Ok | Baton Rouge in August |
| September | 31° / 21° | 9 | 21 | 0 | 132 mm | Ok | Baton Rouge in September |
| October | 27° / 16° | 4 | 27 | 0 | 75 mm | Perfect | Baton Rouge in October |
| November | 21° / 11° | 3 | 27 | 0 | 54 mm | Good | Baton Rouge in November |
| December | 17° / 9° | 5 | 26 | 0 | 88 mm | Good | Baton Rouge in December |