Average annual temperature is 10.2 °C
Absolute maximum temperature: 25.5 °C
Absolute minimum temperature: -3.7 °C
Number of sunny days: 92 days
Number of rainy days: 271 days
Number of snow days: 2 days
Look at detailed online map of Mountain Ash
* Weather data for Mountain Ash 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) | 10.9 | 10.4 | 12.2 | 15.1 | 19.5 | 24.4 | 22.6 | 22.5 | 25.5 | 21.1 | 12.7 | 11.5 |
| Average daytime temperature (°C) | 6.8 | 7.9 | 8.2 | 10.8 | 16.1 | 20.3 | 17.0 | 17.9 | 18.8 | 13.9 | 9.1 | 8.3 |
| Average temperature (°C) | 4.5 | 5.4 | 6.0 | 7.6 | 12.2 | 16.2 | 14.5 | 15.0 | 15.9 | 11.6 | 7.0 | 6.6 |
| Average night temperature (°C) | 2.2 | 2.8 | 3.9 | 4.2 | 8.2 | 12.0 | 11.7 | 12.2 | 13.0 | 9.7 | 5.0 | 4.7 |
| Absolute minimum temperature (°C) | -3.1 | -2.1 | -1.2 | -0.5 | 5.6 | 6.6 | 8.8 | 9.8 | 7.2 | 4.5 | -1.7 | -3.7 |
| 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) | 3.6 | 4.5 | 4.3 | 7.2 | 11.5 | 11.9 | 9.3 | 8.9 | 7.4 | 5.5 | 3.7 | 1.9 |
| Precipitation (mm) | 245 | 21 | 252 | 110 | 66 | 71 | 229 | 126 | 151 | 195 | 142 | 276 |
| Sunny days | 11 | 14 | 2 | 8 | 15 | 12 | 1 | 3 | 9 | 7 | 9 | 1 |
| Rainy days | 20 | 14 | 28 | 22 | 16 | 18 | 30 | 28 | 21 | 24 | 21 | 29 |
| Snow days | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Mountain Ash during the most sunny months:
Months with the longest average daylight duration in Mountain Ash:
The largest precipitation sum in Mountain Ash is at