September · United States
Best time to visit Atlanta in September Weather, crowds & prices
Weather in Atlanta in September
Average temperature 24°C, 108 mm of rain, about 18 days with 6+ hours of sunshine and 67% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
7.2/10
Ranked #5 of 12 months
- Avg temp
- 24°C
- Rainfall
- 108 mm
- Humidity
- 67%
- Days with 6h+ sun
- 18
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Atlanta scores 7.2/10 for sightseeing and cultural travel - an above-average month (#5 of 12). Expect around 24°C, 108 mm of rain, and roughly 18 days with 6+ hours of sunshine this month.
Atlanta mixes civil-rights history, southern food and a canopy of trees around its downtown.
September in Atlanta — reliably good (5th best month)
At 24°C (74°F) this is comfortable city weather in September, with sightseeing easiest before lunch and after the afternoon peak.
108 mm of rain signals a properly wet month, with only about 18 days with 6+ hours of sunshine to count on — build indoor options into the schedule.
That is 7.2/10 on the same scale — 5th of 12 months, versus 9.2/10 for the best month here.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella.
Budget for mid-season pricing, and crowds are moderate.
If your dates are flexible, October is materially better in Atlanta — 2 points higher on the same scale.
Frequently asked
- What is the weather like in Atlanta in September?
- In September, Atlanta averages 24°C, 108 mm of rain, and about 18 days with 6+ hours of sunshine. Its climate-comfort score is 7.2/10.
- Is September a good time to visit Atlanta?
- September earns a 7.2/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Atlanta in September?
- Expect about 108 mm of rain in September. Average humidity is 67% and there are about 18 days with 6+ hours of sunshine.
Curated in Atlanta
Tickets & experiences
Things to do in Atlanta
Atlanta, United States. Live activities and tours from GetYourGuide, matched to this destination.