Atlanta weather in September
Atlanta in September averages 24°C (74°F) and 97 mm of rain.
Of the twelve months in Atlanta, September is the fourth warmest and the third driest.
- Average temp
- 24°C (74°F)
19–29°C · 66–83°F
- Rainfall
- 97 mm
Showers likely
- Sunshine
- —
- Wind
- 12 km/h
What is Atlanta like in September?
Daytime
Days are warm, typically in the mid-20s°C or above.
Rain
Some rain is likely; pack for showers.
Evening
Evenings stay warm.
What should I pack for Atlanta in September?
Loose cotton or linen
Synthetics stop working once you are sweating through them all day.
A refillable water bottle
Daily highs this warm need roughly double the water a temperate day does.
A light rain jacket
About 97 mm falls this month — showers rather than washouts.
September compared with August and October
September in Atlanta is 3°C cooler than August and 12 mm drier than it, which averages 27°C (80°F).
September in Atlanta is 5.7°C warmer than October and 17 mm wetter than it, which averages 18°C (64°F).
Daylight in Atlanta in September
On 15 September the sun is up for 12 hours 22 minutes in Atlanta, rising about 07:21 and setting about 19:43 local time.
September ends 1 hour shorter than it begins, so the last week of the month is a different length of day from the first.
That is 2 hours 1 minute short of June, the longest-lit month here.
Where to stay in Atlanta
Dates are a starting point for September.
Travel guides for Atlanta
What to read before you book.
Atlanta weather by month
TemperatureRainfall
How September compares with the rest of the year
September is highlighted. Every other month links to its own page.
| Month | Average | Rainfall |
|---|---|---|
| January | 7°C / 44°F | 116 mm |
| February | 9°C / 48°F | 116 mm |
| March | 13°C / 55°F | 119 mm |
| April | 17°C / 63°F | 99 mm |
| May | 22°C / 71°F | 90 mm |
| June | 25°C / 78°F | 117 mm |
| July | 27°C / 81°F | 121 mm |
| August | 27°C / 80°F | 109 mm |
| September | 24°C / 74°F | 97 mm |
| October | 18°C / 64°F | 80 mm |
| November | 12°C / 54°F | 102 mm |
| December | 8°C / 47°F | 116 mm |
Similar weather in September
Other destinations whose September averages sit close to this one.
Check another month
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FAQs about Atlanta in September
September climate averages for Atlanta, 1991–2020.
Atlanta averages 24°C (74°F) in September, ranging from about 19°C (66°F) at night to 29°C (83°F) in the afternoon. That is a 1991–2020 average, so an individual week can run either side of it.
Some. About 97 mm falls across September, enough to need a light jacket but not enough to reshape a trip.
Yes. September averages 24°C (74°F) against 18°C (64°F) in October — 5.7°C warmer.
September is 3°C cooler than August, and 12 mm drier.
Yes. September falls inside the most comfortable stretch of the year here, May to October, on temperature and rainfall together.
This page does not show today's weather. It is a 1991–2020 climate normal from Meteostat — a long-run average of what September is usually like, which is what you want when booking months ahead. For today or the coming week, check a live forecast.
About 12 hours 22 minutes of daylight in mid-September, against 14 hours 23 minutes in June and 9 hours 55 minutes in December.
On 15 September, sunrise is about 07:21 and sunset about 19:43 local time. Both shift across the month — the month ends 1 hour shorter than it starts.
