Average annual temperature is 22.8 °C
Absolute maximum temperature: 46.5 °C
Absolute minimum temperature: -0.6 °C
Number of sunny days: 318 days
Number of rainy days: 47 days
Look at detailed online map of Swansea
* Weather data for Swansea United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 19.7 | 23.3 | 26.3 | 38.3 | 37.6 | 41.5 | 46.5 | 45.5 | 42.7 | 37.8 | 31.0 | 24.6 |
| Average daytime temperature (°C) | 15.8 | 19.1 | 20.2 | 30.4 | 33.5 | 36.6 | 44.3 | 41.2 | 36.9 | 31.9 | 24.3 | 19.2 |
| Average temperature (°C) | 9.8 | 11.6 | 13.9 | 22.8 | 27.1 | 30.0 | 37.9 | 35.1 | 30.1 | 24.6 | 17.1 | 12.7 |
| Average night temperature (°C) | 4.9 | 5.3 | 8.4 | 14.6 | 19.7 | 22.3 | 30.3 | 28.6 | 23.0 | 16.1 | 9.5 | 6.4 |
| Absolute minimum temperature (°C) | 0.2 | -0.6 | 1.5 | 4.4 | 12.8 | 18.7 | 25.0 | 23.4 | 18.7 | 7.8 | 3.4 | 2.7 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.2 | 11.0 | 12.0 | 13.0 | 13.9 | 14.4 | 14.2 | 13.4 | 12.4 | 11.3 | 10.4 | 9.9 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 |
| Sunshine mean duration (h) | 7.8 | 9.0 | 8.7 | 12.0 | 12.8 | 13.0 | 12.9 | 11.7 | 10.7 | 10.4 | 9.0 | 8.5 |
| Precipitation (mm) | 49 | 14 | 57 | 0 | 1 | 0 | 0 | 11 | 4 | 0 | 5 | 28 |
| Sunny days | 22 | 19 | 20 | 30 | 29 | 30 | 31 | 23 | 27 | 31 | 28 | 28 |
| Rainy days | 9 | 9 | 11 | 0 | 2 | 0 | 0 | 8 | 3 | 0 | 2 | 3 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Swansea is at