WeatherArchive / Compare cities / Atlanta vs London
Atlanta vs London weather: climate comparison
Atlanta is the warmer of the two, averaging 62°F (17°C) over the year against 52°F (11°C) in London. Atlanta is wetter, with 49.0 in (1245 mm) of precipitation a year to London's 26.4 in (671 mm). Below: every month side by side, from 30 years of ERA5 data (1996–2025).
- Mean temperature
- 16.7°C Atlanta
10.9°C London - Annual precipitation
- 1245.1 mm Atlanta
671.0 mm London - Rainy days a year
- 128 Atlanta
128 London - Sunshine per day
- 9.1 h Atlanta
7.5 h London
Month by month
| Month | Atlanta | London |
|---|---|---|
| January | 10.9°C | 7.3°C |
| February | 13.5°C | 8.3°C |
| March | 17.4°C | 10.6°C |
| April | 21.8°C | 13.7°C |
| May | 26.2°C | 16.9°C |
| June | 29.6°C | 20.1°C |
| July | 30.8°C | 21.9°C |
| August | 30.4°C | 21.6°C |
| September | 27.5°C | 19.1°C |
| October | 22.4°C | 15.1°C |
| November | 16.8°C | 10.6°C |
| December | 12.4°C | 8.0°C |
Year at a glance
| Measure | Atlanta | London |
|---|---|---|
| Mean annual temperature | 16.7°C | 10.9°C |
| Warmest month (avg high) | Jul · 31°C | Jul · 22°C |
| Coldest month (avg low) | Jan · 2°C | Jan · 2°C |
| Annual range (warmest high − coldest low) | 29°C | 20°C |
| Annual precipitation | 1245.1 mm | 671.0 mm |
| Rainy days per year | 128 | 128 |
| Wettest / driest month | Jul / Oct | Nov / Mar |
| Average sunshine per day | 9.1 h | 7.5 h |
In short: Atlanta is the warmest overall (16.7°C mean); Atlanta gets the most precipitation (1245.1 mm a year); Atlanta is the sunniest (9.1 h a day on average); London has the smallest swing between its warmest and coldest months.
Record high 1996–2025: Atlanta 39.9°C (2012-06-30), London 37.9°C (2022-07-19). Record low: Atlanta -13.6°C (2022-12-24), London -10.3°C (2021-02-11).
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. Monthly means of daily ERA5 values, 1996–2025, for the grid cells nearest Atlanta (33.78, -84.40) and London (51.49, -0.16).
Which months differ most?
The gap in average highs is widest in June, when Atlanta runs 17°F / 10°C warmer, and narrowest in January (7°F / 4°C apart). The biggest rainfall difference is in March: Atlanta gets 2.8 in (71 mm) more on average.
Add a third or fourth city, or swap in any other place, in the full comparison tool. For one city in depth, see the Atlanta climate and London climate pages.
Compare Atlanta or London with another city
Questions people ask
Is Atlanta warmer than London?
Atlanta is warmer on average: its mean annual temperature is 62°F (17°C) against 52°F (11°C) in London (ERA5, 1996–2025).
Which gets more rain, Atlanta or London?
Atlanta, with about 49.0 in (1245 mm) of precipitation a year and 128 days with at least 1 mm, compared with 26.4 in (671 mm) and 128 days in London.
Which is sunnier, Atlanta or London?
Atlanta averages more sunshine: 9.1 h a day against 7.5 h. Sunshine duration is modelled from cloud cover.
How reliable is this comparison?
Both cities use the same 30-year reanalysis, so differences are consistent. Absolute values describe a grid cell several kilometres wide and can differ by a degree or two from the airport station.