WeatherArchive / Climate averages / Atlanta
Atlanta weather by month: climate averages
Atlanta averages 62°F (17°C) over the year. July is warmest, with highs around 87°F (31°C); January is coldest, with lows near 35°F (2°C). About 49 inches (1245 mm) of precipitation falls on roughly 128 days a year, from 30 years of ERA5 data (1996–2025).
| Month | Avg high | Avg low | Precip. | Days ≥1 mm | Sunshine / day |
|---|---|---|---|---|---|
| January | 10.9°C | 1.5°C | 109.3 mm | 10.1 | 6.8 h |
| February | 13.5°C | 3.5°C | 115.7 mm | 10.1 | 7.1 h |
| March | 17.4°C | 6.7°C | 116.2 mm | 10.2 | 8.4 h |
| April | 21.8°C | 10.6°C | 99.4 mm | 9.7 | 10.1 h |
| May | 26.2°C | 15.4°C | 92.7 mm | 10.4 | 10.9 h |
| June | 29.6°C | 19.7°C | 100.9 mm | 14.1 | 11.3 h |
| July | 30.8°C | 21.6°C | 128.5 mm | 16.1 | 11.4 h |
| August | 30.4°C | 21.2°C | 107.7 mm | 13.7 | 11.0 h |
| September | 27.5°C | 18.3°C | 102.3 mm | 8.9 | 9.6 h |
| October | 22.4°C | 12.4°C | 70.8 mm | 6.7 | 8.7 h |
| November | 16.8°C | 6.8°C | 89.7 mm | 8.0 | 7.5 h |
| December | 12.4°C | 3.4°C | 111.9 mm | 10.2 | 6.2 h |
Record high 1996–2025: 39.9°C on 2012-06-30. Record low: -13.6°C on 2022-12-24.
Source: Open-Meteo Historical Weather API (CC BY 4.0). Values are ERA5 reanalysis model data on a ~9–25 km grid, not readings from a weather station, so a single town’s thermometer can differ by a few degrees and local showers can be missed. Grid cell 33.78, -84.40 at 327 m. For snowfall, humidity and a best-time-to-visit score, open Atlanta in the climate tool.
Atlanta weather month by month
The wettest month in Atlanta is July, averaging 5.1 in (129 mm); the driest is October at 2.8 in (71 mm). July has the most days with at least 1 mm of rain (about 16). July is the sunniest month, with about 11.4 hours of sunshine a day, against 6.2 hours in December. If you like average highs between 64 °F and 82 °F (18–28 °C) with few rainy days, aim for April, September and October.
Planning a particular day? See how often that date was wet or hot over 30 years with the event weather odds, or look up what the weather actually was on any past date in the historical weather archive.
Questions people ask
What is the warmest month in Atlanta?
July, with an average daily high of 87°F (31°C) over 1996–2025.
What is the coldest month in Atlanta?
January, when nights average about 35°F (2°C).
What is the rainiest month in Atlanta?
July has the most precipitation (about 5.1 in (129 mm)), and July has the most rainy days (about 16 days with 1 mm or more). The driest month is October.
How much sunshine does Atlanta get?
About 9.1 hours of bright sunshine a day averaged over the year, from 6.2 h in December to 11.4 h in July. Sunshine here is the model’s estimate of hours with direct sun, not hours of daylight.
What is the best month to visit Atlanta for mild weather?
By average high between 64 °F and 82 °F (18–28 °C) and the fewest rainy days: April, September, October. Prices, crowds and events are not included.