Average annual temperature is 11.7 °C
Absolute maximum temperature: 26.9 °C
Absolute minimum temperature: -3.3 °C
Number of sunny days: 91 days
Number of rainy days: 274 days
Look at detailed online map of Swansea
* Weather data for Swansea United Kingdom is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 12.0 | 12.3 | 13.6 | 15.3 | 20.9 | 26.6 | 23.6 | 23.5 | 26.9 | 20.1 | 14.2 | 12.7 |
| Average daytime temperature (°C) | 8.3 | 9.3 | 9.7 | 12.3 | 17.1 | 21.5 | 18.3 | 19.0 | 20.0 | 15.3 | 10.9 | 10.2 |
| Average temperature (°C) | 6.0 | 6.6 | 7.5 | 9.1 | 13.2 | 17.7 | 15.9 | 16.3 | 17.1 | 13.2 | 8.7 | 8.4 |
| Average night temperature (°C) | 3.5 | 3.6 | 5.2 | 5.5 | 9.1 | 13.5 | 13.1 | 13.4 | 14.0 | 11.1 | 6.0 | 6.2 |
| Absolute minimum temperature (°C) | -2.6 | -1.2 | -0.6 | 1.7 | 6.5 | 8.7 | 9.6 | 9.5 | 6.7 | 4.3 | -2.7 | -3.3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 10.0 | 12.0 | 14.0 | 16.0 | 16.0 | 16.0 | 15.0 | 13.0 | 11.0 | 9.0 | 8.0 |
| Daylight mean duration (h) | 8.4 | 10.0 | 11.9 | 13.9 | 15.6 | 16.6 | 16.1 | 14.6 | 12.7 | 10.7 | 8.9 | 7.9 |
| Daylight minimum duration (h) | 7.0 | 9.0 | 10.0 | 12.0 | 14.0 | 16.0 | 15.0 | 13.0 | 11.0 | 9.0 | 8.0 | 7.0 |
| Sunshine mean duration (h) | 3.5 | 4.6 | 4.7 | 7.7 | 11.4 | 12.0 | 9.2 | 8.7 | 7.5 | 4.8 | 4.3 | 2.2 |
| Precipitation (mm) | 207 | 28 | 230 | 91 | 60 | 68 | 215 | 149 | 143 | 206 | 154 | 277 |
| Sunny days | 11 | 10 | 4 | 9 | 17 | 13 | 1 | 0 | 8 | 6 | 8 | 4 |
| Rainy days | 20 | 18 | 27 | 21 | 14 | 17 | 30 | 31 | 22 | 25 | 22 | 27 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Swansea during the most sunny months:
Months with the longest average daylight duration in Swansea:
The largest precipitation sum in Swansea is at