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Dallas vs London weather: climate comparison
Dallas is the warmer of the two, averaging 67°F (20°C) over the year against 52°F (11°C) in London. Dallas is wetter, with 43.0 in (1092 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
- 19.7°C Dallas
10.9°C London - Annual precipitation
- 1091.9 mm Dallas
671.0 mm London - Rainy days a year
- 94 Dallas
128 London - Sunshine per day
- 9.4 h Dallas
7.5 h London
Month by month
| Month | Dallas | London |
|---|---|---|
| January | 13.4°C | 7.3°C |
| February | 15.5°C | 8.3°C |
| March | 20.1°C | 10.6°C |
| April | 24.2°C | 13.7°C |
| May | 28.3°C | 16.9°C |
| June | 32.2°C | 20.1°C |
| July | 34.7°C | 21.9°C |
| August | 34.9°C | 21.6°C |
| September | 31.2°C | 19.1°C |
| October | 25.7°C | 15.1°C |
| November | 19.3°C | 10.6°C |
| December | 14.6°C | 8.0°C |
Year at a glance
| Measure | Dallas | London |
|---|---|---|
| Mean annual temperature | 19.7°C | 10.9°C |
| Warmest month (avg high) | Aug · 35°C | Jul · 22°C |
| Coldest month (avg low) | Jan · 4°C | Jan · 2°C |
| Annual range (warmest high − coldest low) | 31°C | 20°C |
| Annual precipitation | 1091.9 mm | 671.0 mm |
| Rainy days per year | 94 | 128 |
| Wettest / driest month | May / Jul | Nov / Mar |
| Average sunshine per day | 9.4 h | 7.5 h |
In short: Dallas is the warmest overall (19.7°C mean); Dallas gets the most precipitation (1091.9 mm a year); Dallas is the sunniest (9.4 h a day on average); London has the smallest swing between its warmest and coldest months.
Record high 1996–2025: Dallas 42.9°C (2023-08-18), London 37.9°C (2022-07-19). Record low: Dallas -18.9°C (2021-02-16), 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 Dallas (32.79, -96.82) and London (51.49, -0.16).
Which months differ most?
The gap in average highs is widest in August, when Dallas runs 24°F / 13°C warmer, and narrowest in January (11°F / 6°C apart). The biggest rainfall difference is in May: Dallas gets 3.4 in (86 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 Dallas climate and London climate pages.
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Questions people ask
Is Dallas warmer than London?
Dallas is warmer on average: its mean annual temperature is 67°F (20°C) against 52°F (11°C) in London (ERA5, 1996–2025).
Which gets more rain, Dallas or London?
Dallas, with about 43.0 in (1092 mm) of precipitation a year and 94 days with at least 1 mm, compared with 26.4 in (671 mm) and 128 days in London.
Which is sunnier, Dallas or London?
Dallas averages more sunshine: 9.4 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.