Atlanta Weather in September
September in Atlanta brings high temperatures, with daytime highs of 29°C (84°F) and nights around 18°C (64°F). Quite a bit of rainfall is expected, around 98 mm (3.9 in), so pack an umbrella.
Rainfall in Atlanta in September
Historically, approximately 8 days this month are expected to have rain, averaging 98 mm (3.9 in). Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.
Temperature in Atlanta in September
September in Atlanta is generally perfect, with days reaching 29°C (84°F) and nights settling around 18°C (64°F). Overall, the month follows a fairly predictable daily temperature pattern. At 18°C (64°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in Atlanta in September
Expect a lot of sunshine this month, with about 227 hours of sun. These sunny conditions add to the overall experience.If you favor pleasant temperatures and minimal rainfall, September is one of the best months to visit Atlanta.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Atlanta's climate page.
Atlanta Temperature in September
Min Temperature
18°C (64°F)
Max Temperature
29°C (84°F)
Chance of Rain
27%
Precipitation
98 mm (3.9 in)
Rainy days
8 days
Humidity
74%
Sunshine
227 hours
Percentage Sunshine
61%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Atlanta typically drop from around 29°C (84°F) at the start of September to approximately 26°C (79°F) by the end. Nights are pleasant, with lows typically ranging from 15°C (59°F) to 21°C (70°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Atlanta in September
Browse day-by-day weather records for Atlanta spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Atlanta historical weather extremes in September
According to our 49 years of weather records for Atlanta, the following extremes were recorded between 1976 and 2025.
- The warmest day in September was on September 9, 2019, with a maximum of 36°C (97°F).
- The coldest night in September in Atlanta was on September 26, 2001, with a minimum of 7°C (45°F).
Best Places in the United States of America in September
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in September →
perfect weather
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tolerable
unpleasant
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What to Wear in Atlanta in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Atlanta in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Atlanta's climate page.
Temperature Rainfall Sunshine Humidity
See the full Atlanta climate overview or explore weather in the United States of America.
