Average annual temperature is 9.9 °C
Absolute maximum temperature: 26.1 °C
Absolute minimum temperature: -3.9 °C
Number of sunny days: 87 days
Number of rainy days: 276 days
Number of snow days: 2 days
Look at detailed online map of Dyffryn Cellwen
* Weather data for Dyffryn Cellwen 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) | 10.3 | 11.3 | 12.3 | 15.3 | 20.9 | 25.2 | 21.8 | 22.7 | 26.1 | 19.2 | 12.3 | 10.9 |
| Average daytime temperature (°C) | 6.5 | 7.7 | 8.0 | 10.9 | 16.2 | 20.2 | 16.5 | 17.2 | 18.5 | 13.5 | 8.8 | 8.0 |
| Average temperature (°C) | 4.2 | 5.1 | 5.7 | 7.5 | 11.9 | 16.1 | 13.9 | 14.4 | 15.6 | 11.2 | 6.6 | 6.4 |
| Average night temperature (°C) | 1.7 | 2.5 | 3.5 | 3.8 | 7.6 | 11.7 | 11.0 | 11.6 | 12.5 | 9.2 | 4.2 | 4.4 |
| Absolute minimum temperature (°C) | -3.3 | -2.0 | -1.6 | -0.1 | 4.8 | 6.6 | 8.2 | 8.1 | 5.3 | 3.1 | -3.1 | -3.9 |
| 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 | 15.7 | 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) | 3.2 | 4.1 | 3.9 | 7.4 | 11.1 | 11.4 | 8.4 | 8.1 | 7.3 | 4.5 | 3.5 | 1.9 |
| Precipitation (mm) | 336 | 42 | 345 | 133 | 66 | 96 | 299 | 178 | 207 | 221 | 195 | 356 |
| Sunny days | 11 | 12 | 3 | 8 | 17 | 13 | 2 | 1 | 6 | 6 | 6 | 2 |
| Rainy days | 20 | 16 | 27 | 22 | 14 | 17 | 29 | 30 | 24 | 25 | 24 | 28 |
| Snow days | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Dyffryn Cellwen during the most sunny months:
Months with the longest average daylight duration in Dyffryn Cellwen:
The largest precipitation sum in Dyffryn Cellwen is at