Atlanta, Georgia Weather in September
Typical September in Atlanta, Georgia: days around 84°F, nights around 66°F, and the month cools about 5°F from early to late — based on 30-year climate normals (NOAA, 1991–2020), day by day below.
84°Faverage high
66°Faverage low
−5°Fearly vs late September
18°Fday-to-night swing
Early, mid and late September in Atlanta
The month split in three — the part of the answer a 30-row table hides.
| Part of September | Avg high | Avg low |
|---|---|---|
| Early September (Sep 1–10) | 86°F | 69°F |
| Mid September (Sep 11–20) | 84°F | 66°F |
| Late September (Sep 21–30) | 81°F | 63°F |
Daylight in Atlanta during September
How much light the day gives you — useful for planning what you can still do after work.
12 h 52 minon Sep 1
11 h 52 minon Sep 30
−1 h 00 minlost across September
Day-by-day September normals for Atlanta
Long-term daily averages (NOAA 1991–2020) — climate, not a live forecast. For the next 16 days, use the live forecast.
| Day | Avg high | Avg low |
|---|---|---|
| Sep 1 | 87°F | 70°F |
| Sep 2 | 87°F | 69°F |
| Sep 3 | 87°F | 69°F |
| Sep 4 | 87°F | 69°F |
| Sep 5 | 86°F | 69°F |
| Sep 6 | 86°F | 69°F |
| Sep 7 | 86°F | 68°F |
| Sep 8 | 86°F | 68°F |
| Sep 9 | 86°F | 68°F |
| Sep 10 | 85°F | 68°F |
| Sep 11 | 85°F | 67°F |
| Sep 12 | 85°F | 67°F |
| Sep 13 | 85°F | 67°F |
| Sep 14 | 84°F | 67°F |
| Sep 15 | 84°F | 66°F |
| Sep 16 | 84°F | 66°F |
| Sep 17 | 84°F | 66°F |
| Sep 18 | 84°F | 65°F |
| Sep 19 | 83°F | 65°F |
| Sep 20 | 83°F | 65°F |
| Sep 21 | 83°F | 64°F |
| Sep 22 | 82°F | 64°F |
| Sep 23 | 82°F | 64°F |
| Sep 24 | 82°F | 64°F |
| Sep 25 | 82°F | 63°F |
| Sep 26 | 81°F | 63°F |
| Sep 27 | 81°F | 62°F |
| Sep 28 | 81°F | 62°F |
| Sep 29 | 80°F | 62°F |
| Sep 30 | 80°F | 61°F |
September in Atlanta through the years
Real photos taken in Atlanta in September by Weathershot app users — different years, same month.
More months: October · November · December · January · Live Atlanta forecast
September elsewhere: Chicago weather in September · Denver weather in September · Miami weather in September · New York weather in September · Phoenix weather in September · Seattle weather in September
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The September photos above were taken with Weathershot — it stamps the real weather onto your picture. Snap one in Atlanta and it could land on this page.
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Climate normals: NOAA 1991–2020 (GHCND). Photos: Weathershot community, taken on location. © Weathershot · Byss Mobile