Treorchy Weather Forecast
- 11
- 18
Cloudy
- 9
- 17
Thunder shower
- 13
- 17
Cloudy
- 10
- 16
Heavy rain shower
- 10
- 15
Heavy rain shower
- 10
- 14
Heavy rain shower
- 12
- 15
Heavy rain
Today 7 Sep Wales
More settled on Friday and Saturday with a few light showers, but mainly dry with bright or sunny spells. Unsettled again on Sunday with outbreaks of rain and strong winds.
Treorchy Temperature Statistics
September Temperature
St-athan (28km)
Lowest 5 September, 2025
11.6 °CAverage September
15.9 °CHighest 1 September, 2025
19.5 °C
Climate (2020–Present)
St-athan (28km)
Average Low 2020–2025
8.8 °CAverage 2020–2025
11.6 °CAverage High 2020–2025
14.5 °C