September weather forecast and climate
Baton Rouge, LA

Manicured lawns and beautiful trees approaching the State Capitol building in Baton Rouge, Louisiana
Manicured lawns and beautiful trees approaching the State Capitol building in Baton Rouge, Louisiana
Average temperature in September - Baton Rouge, LA
  • Average high temperature in September: 31.5°C

The warmest month (with the highest average high temperature) is August (33.6°C).
The month with the lowest average high temperature is January (16.8°C).

  • Average low temperature in September: 20.3°C

The month with the highest average low temperature is July (23.2°C).
The coldest month (with the lowest average low temperature) is January (5.1°C).

Average humidity in September - Baton Rouge, LA
  • Average humidity in September: 77.5%

The month with the highest relative humidity is August (78%).
The month with the lowest relative humidity is January (62%).

Average rainfall in September - Baton Rouge, LA
  • Average rainfall in September: 115.3mm

The wettest month (with the highest rainfall) is June (162.8mm).
The driest month (with the lowest rainfall) is November (104.1mm).

Average rainfall days in September - Baton Rouge, LA
  • Average rainfall days in September: 8.5 days

The month with the highest number of rainy days is July (12.9 days).
Months with the lowest number of rainy days are April and October (7.5 days).

Average snowfall in September - Baton Rouge, LA
  • Average snowfall in September: 0mm

The month with the highest snowfall is February (5.1mm).
Months with the lowest snowfall are January, March, April, May, June, July, August, September, October, November and December (0mm).

Average daylight in September / Average sunshine in September - Baton Rouge, LA
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 14.1h).
The month with shortest days is December (Average daylight: 10.2h).

  • Average sunshine in September: 8h

Months with most sunshine are May, June and July (Average sunshine: 9h).
Months with least sunshine are January and December (Average sunshine: 5).

Average UV index in September - Baton Rouge, LA
  • Average UV index in September: 9

Months with the highest UV index are June and July (UV index 11).
Months with the lowest UV index are January and December (UV index 4).

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