Atlanta
Georgia, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Atlanta, GA

Beautiful sky and cityscape of Atlanta in Georgia
Beautiful sky and cityscape of Atlanta in Georgia
The start of autumn signals warm temperatures but also storms and cloudbursts. 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 62.6°F (17°C).

What is the temperature in September in Atlanta?

In Atlanta, in September, the average high-temperature is 82.2°F (27.9°C), and the average low-temperature is 64.8°F (18.2°C).

What is the average humidity in September in Atlanta?

The average relative humidity in September in Atlanta is 73.9%.

How much does it rain in Atlanta in September?

In Atlanta, during September, the rain falls for 7.5 days and regularly aggregates up to 4.5" (113.5mm) of precipitation.

What is the average length of the day in September in Atlanta?

In Atlanta, Georgia, the average length of the day in September is 12.4h.

How long on average sun shines in September in Atlanta?

In September, the average sunshine in Atlanta, Georgia, is 7.6h.

How high is the UV index in September in Atlanta?

The average daily maximum UV index in September is 8. A UV Index of 8 to 10 symbolizes a very high health threat from the exposure to the Sun's UV radiation.
Average temperature in September - Atlanta, GA
  • Average high temperature in September: 82.2°F

The warmest month (with the highest average high temperature) is July (89.1°F).
The month with the lowest average high temperature is January (52.3°F).

  • Average low temperature in September: 64.8°F

The month with the highest average low temperature is July (71.3°F).
The coldest month (with the lowest average low temperature) is January (34.3°F).

Average humidity in September - Atlanta, GA
  • Average humidity in September: 73.9%

The month with the highest relative humidity is August (74.8%).
The month with the lowest relative humidity is April (61%).

Average rainfall in September - Atlanta, GA
  • Average rainfall in September: 4.5"

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

Average rainfall days in September - Atlanta, GA
  • Average rainfall days in September: 7.5 days

The month with the highest number of rainy days is July (11.7 days).
The month with the lowest number of rainy days is October (6.9 days).

Average snowfall in September - Atlanta, GA
  • Average snowfall in September: 0"

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

Average snowfall days in September - Atlanta, GA
  • Average snowfall days in September: 0 days

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

Average daylight in September / Average sunshine in September - Atlanta, GA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with shortest days is December (Average daylight: 9.9h).

  • Average sunshine in September: 7.6h

The 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 - Atlanta, GA
  • Average UV index in September: 8

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