Georgia, USA
Long term weather forecast
Long term weather forecast

September weather forecast and Climate
Atlanta, GA

The start of autumn signals warm temperatures but also storms and cloudburst. The atmospheric climate is mild, humid, and soggy. With humidity still high at 75% and sunlight hours averaging 8.1 hours per day, September is a bit dump time to visit. Daytime temperatures are a muggy 82.4°F (28°C) and hardly goes below 69.8°F (21°C). Nights are relaxed with temperatures of around 62.6°F (17°C).
  • Average high temperature in September: 82.2°F

Warmest month (with highest average high temperature) is July (89.1°F).
Month with lowest average high temperature is January (52.3°F).

  • Average low temperature in September: 64.8°F

Month with highest average low temperature is July (71.3°F).
Coldest month (with lowest average low temperature) is January (34.3°F).

  • Average humidity in September: 73.9%

Month with highest relative humidity is August (74.8%).
Month with lowest relative humidity is April (61%).

  • Average rainfall in September: 4.5"

Wettest month (with highest rainfall) is July (5.3").
Driest months (with lowest rainfall) are April and October (3.4").

  • Average rainfall days in September: 7.5 days

Month with highest number of rainy days is July (11.7 days).
Month with lowest number of rainy days is October (6.9 days).

  • Average snowfall in September: 0"

Month with highest snowfall is January (1.3").
Months with lowest snowfall are April, May, June, July, August, September, October and November (0").

  • Average snowfall days in September: 0 days

Month with highest number of snowfall days is January (0.8 days).
Months with lowest number of snowfall days are April, May, June, July, August, September, October and November (0 days).

  • Average daylight in September: 12h

Months with longest days are May, June and July (Average daylight: 14h).
Months with shortest days are January, November and December (Average daylight: 10h).

  • Average sunshine in September: 7.6h

Month with most sunshine is June (Average sunshine: 9.5h).
Months with least sunshine are January and December (Average sunshine: 5.3).

  • Average UV index in September: 8

Months with highest UV index are June, July and August (UV index 10).
Months with lowest UV index are January and December (UV index 3).