Atlanta climate
Atlanta is warmest in July, with average highs of 31 °C, and coldest in January, when nights average 2.0 °C. July is the wettest month (116 mm) and October the driest (76 mm). Figures are 1991–2020 climate normals.
Across a full year Atlanta averages 1,204 mm of rain, 148 days above 25 °C and 34 days below freezing.
United States · 320 m elevation · population 510,823 · 1991–2020 normals
Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month
- Warmest month July 31 °C
- Coldest month January 2.0 °C
- Driest month October 76 mm
- Wettest month July 116 mm
- Least cloud October 45 % cloud
- Hottest on record June 40 °C
- Coldest on record January -14 °C
What to expectAtlanta through the year
Atlanta has a clear annual cycle: average daily highs run from 11 °C in January to 31 °C in July, a swing of 20 °C in mean temperature across the year.
Counted across a normal year, 148 days a year reach 25 °C, 57 of them reach 30 °C, 34 nights drop below freezing. The warmest reading in the 1991–2020 record is 40 °C, in June.
Rain is spread fairly evenly through the year, from 76 mm in October to 116 mm in July. There is no dry season to aim for.
Month by month
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| January | 11.1 °C | 110 mm | 58 % |
| February | 13.4 °C | 114 mm | 60 % |
| March | 17.4 °C | 114 mm | 57 % |
| April | 21.9 °C | 93 mm | 53 % |
| May | 26.2 °C | 82 mm | 54 % |
| June | 29.3 °C | 101 mm | 57 % |
| July | 30.7 °C | 116 mm | 57 % |
| August | 30.2 °C | 105 mm | 56 % |
| September | 27.4 °C | 91 mm | 50 % |
| October | 22.3 °C | 76 mm | 45 % |
| November | 16.6 °C | 94 mm | 49 % |
| December | 12.3 °C | 109 mm | 60 % |
Temperature month by month
| Month | Avg high | Avg low | Mean | Record high | Record low | Days above 25 °C | Days above 30 °C | Days below 0 °C |
|---|---|---|---|---|---|---|---|---|
| January | 11.1 °C | 2.0 °C | 5.9 °C | 22.8 °C | -14.0 °C | 0 | 0 | 12 |
| February | 13.4 °C | 3.5 °C | 7.8 °C | 23.8 °C | -12.7 °C | 0 | 0 | 8 |
| March | 17.4 °C | 6.7 °C | 11.5 °C | 30.5 °C | -10.3 °C | 1 | 0 | 4 |
| April | 21.9 °C | 10.7 °C | 16.0 °C | 30.9 °C | -2.4 °C | 7 | 0 | 0 |
| May | 26.2 °C | 15.4 °C | 20.7 °C | 35.0 °C | 4.1 °C | 20 | 4 | 0 |
| June | 29.3 °C | 19.6 °C | 24.2 °C | 39.9 °C | 11.3 °C | 28 | 12 | 0 |
| July | 30.7 °C | 21.5 °C | 25.8 °C | 39.5 °C | 13.9 °C | 30 | 18 | 0 |
| August | 30.2 °C | 21.1 °C | 25.4 °C | 38.4 °C | 14.0 °C | 30 | 16 | 0 |
| September | 27.4 °C | 18.3 °C | 22.5 °C | 35.9 °C | 7.9 °C | 23 | 7 | 0 |
| October | 22.3 °C | 12.5 °C | 17.0 °C | 35.0 °C | 0.6 °C | 8 | 0 | 0 |
| November | 16.6 °C | 6.8 °C | 11.2 °C | 27.6 °C | -5.4 °C | 1 | 0 | 2 |
| December | 12.3 °C | 3.6 °C | 7.3 °C | 23.7 °C | -10.1 °C | 0 | 0 | 9 |
Rain, sun and wind month by month
| Month | Rainfall | Wet days | Daylight | Cloud cover | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 110 mm | 10 | 10 h/day | 58 % | 72 % | 19 km/h |
| February | 114 mm | 10 | 11 h/day | 60 % | 71 % | 19 km/h |
| March | 114 mm | 10 | 12 h/day | 57 % | 69 % | 19 km/h |
| April | 93 mm | 10 | 13 h/day | 53 % | 68 % | 18 km/h |
| May | 82 mm | 10 | 14 h/day | 54 % | 68 % | 16 km/h |
| June | 101 mm | 14 | 14 h/day | 57 % | 72 % | 13 km/h |
| July | 116 mm | 16 | 14 h/day | 57 % | 74 % | 12 km/h |
| August | 105 mm | 13 | 13 h/day | 56 % | 73 % | 12 km/h |
| September | 91 mm | 9 | 12 h/day | 50 % | 71 % | 14 km/h |
| October | 76 mm | 7 | 11 h/day | 45 % | 70 % | 15 km/h |
| November | 94 mm | 8 | 10 h/day | 49 % | 70 % | 17 km/h |
| December | 109 mm | 10 | 9.9 h/day | 60 % | 74 % | 18 km/h |
Where Atlanta ranks
| Ranking | Position | Value |
|---|---|---|
| Places with the best weather in North America in October | 25thof 50 | 94/100 |
Planning a trip? See the best time to visit Atlanta.
QuestionsCommon questions about Atlanta’s climate
When is the best time to visit Atlanta?
That depends on what you want, so the honest answer is a comparison rather than a single month. May, September, October sit closest to 20 °C on average, July is the warmest month and October the driest. The month-by-month table above has the full picture.
How hot does Atlanta get?
In July, the warmest month, daily highs average 31 °C. About 57 days a year pass 30 °C. The highest value in the 1991–2020 record is 40 °C.
How cold does it get in winter?
Nights average 2.0 °C in January, the coldest month. A normal year has 34 nights below freezing.
Which month is wettest in Atlanta?
July, averaging 116 mm over 16 days with rain. The driest month is October with 76 mm. The year as a whole averages 1,204 mm.
Are these figures a forecast?
No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Atlanta rather than what any particular week will bring. Individual years can differ substantially from the normal.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.