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United States weather

Weather in Baton Rouge, Louisiana for September 2025

Your guide to Baton Rouge weather in September - trends and predictions

    Official Weather Alert ⚠️

  • Meteorological - Air Quality Alert - See hour by hour.

    • Temperatures

  • Until now, September 2025 in Baton Rouge is slightly cooler than the historical average by -0.6 °F.

  • The forecast for the upcoming days in Baton Rouge predicts a temperature of 34.6 °F, which is slightly above the historical average.

  • In general, the average temperature in Baton Rouge at the beginning of September is 32.7 °F. As the month progressed, temperatures tended to slightly decrease, reaching an average of 32.6 °F by the end of September.

    • Rain 🌧️

  • Baton Rouge in September brings notable rainfall, with an average of 16 rainy days and a total precipitation of 197.6 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
14
Dry days
Average rainy days
16
Rainy days
Average snowy days
0
Snow days
Average temperatures
32°/22°
Temperatures
Average wind speed
15 km/h
Avg max wind
Average humidity
68 %
Avg humidity

Baton Rouge Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Patchy rain possible
33°
2
Patchy rain possible
34°
3
Patchy rain possible
34°
4
Light rain shower
31°
5
Cloudy
32°
6
Sunny
33°
7
Thundery outbreaks possible
32°
8
Sunny
33°
9
Sunny
32°
10
Sunny
32°
11
Overcast
31°
12
Cloudy
32°
13
Weather Alert Sunny
37°
14
Weather Alert Partly cloudy
33°
15
Sunny
35°
16
Sunny
35°
17
Sunny
36°
18
Sunny
35°
19
Sunny
35°
20
Sunny
36°
21
Sunny
36°
22
Patchy rain possible
35°
23
Patchy rain possible
35°
24
Patchy rain possible
28°
25
Partly cloudy
34°
26
Sunny
34°
27
Patchy rain possible
31°
28
Partly cloudy
33°
29
Mist
34°
30
Mist
34°

Temperatures trend during September in Baton Rouge

See the weather trend as well as the moving average line

September weather in Baton Rouge day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Patchy rain possible
Patchy rain possible
 33° /22° 0.6 mm 7
Sept. 2 Patchy rain possible
Patchy rain possible
 34° /23° 0.4 mm 7
Sept. 3 Patchy rain possible
Patchy rain possible
 34° /23° 33 mm 8
Sept. 4 Light rain shower
Light rain shower
 31° /23° 7.6 mm 7
Sept. 5 Cloudy
Cloudy
 32° /23° 6.7 mm 7
Sept. 6 Sunny
Sunny
 33° /22° 9.1 mm 7
Sept. 7 Thundery outbreaks possible
Thundery outbreaks possible
 32° /21° 1.1 mm 7
Sept. 8 Sunny
Sunny
 33° /20° 2.7 mm 8
Sept. 9 Sunny
Sunny
 32° /19° 0.7 mm 7
Sept. 10 Sunny
Sunny
 32° /21° 3 mm 7
Sept. 11 Overcast
Overcast
 31° /22° 40.2 mm 7
Sept. 12 Cloudy
Cloudy
 32° /21° 3.9 mm 7
Sept. 13 Sunny
Sunny
 37° /24° 0 mm 2
Sept. 14 Partly cloudy
Partly cloudy
 33° /22° 0 mm 1.6
Sept. 15 Sunny
Sunny
 35° /24° 0 mm 1.7
Sept. 16 Sunny
Sunny
 35° /22° 0 mm 1.9
Sept. 17 Sunny
Sunny
 36° /22° 0 mm 0
Sept. 18 Sunny
Sunny
 35° /21° 0 mm 7
Sept. 19 Sunny
Sunny
 35° /22° 0 mm 7
Sept. 20 Sunny
Sunny
 36° /22° 0 mm 7
Sept. 21 Sunny
Sunny
 36° /22° 0 mm 7
Sept. 22 Patchy rain possible
Patchy rain possible
 35° /22° 0.8 mm 6
Sept. 23 Patchy rain possible
Patchy rain possible
 35° /20° 1 mm 6
Sept. 24 Patchy rain possible
Patchy rain possible
 28° /22° 0.5 mm 5
Sept. 25 Partly cloudy
Partly cloudy
 34° /19° 0 mm 7
Sept. 26 Sunny
Sunny
 34° /21° 0 mm 7
Sept. 27 Patchy rain possible
Patchy rain possible
 31° /19° 0 mm 7
Sept. 28 Partly cloudy
Partly cloudy
 33° /20° 0 mm 8
Sept. 29 Mist
Mist
 34° /22° 0 mm 8
Sept. 30 Mist
Mist
 34° /21° 0 mm 8
Next
Important Notice
Our weather forecast for Baton Rouge in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Baton Rouge forecast closer to your planned date for the most up-to-date weather information.
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Baton Rouge in September - FAQ

What are the expected maximum and minimum temperatures in Baton Rouge during September?
During September, expect a variety of temperatures with highs around 32° and lows near 22°, suitable for diverse activities and preferences.
How much rainfall should be expected in Baton Rouge during September?
Significant rainfall exceeding 197.6 mm is expected in Baton Rouge during September, occurring over more than 16 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Baton Rouge during September?
The average wind speed in Baton Rouge during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Baton Rouge

Explore the daily rainfall trends and prepare for Baton Rouges September weather 💧

UV exposure in Baton Rouge during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Location coordinates Where is Baton Rouge?

Get accurate weather forecasts for Baton Rouge, located at latitude 30.443 and longitude -91.187. Stay updated with localized weather information tailored for Baton Rouge.

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