Mertyn Weather Forecast
- 9
- 19
Cloudy
- 10
- 17
Partly cloudy
- 18
- 20
Cloudy
- 12
- 20
Sunny day
- 11
- 17
Sunny day
- 12
- 17
Cloudy
- 12
- 17
Light rain
Today 27 Sep Wales
Cloudy on Sunday with a strengthening wind. Outbreaks of rain will continue through the day, turning heavy and blustery at times, particularly into the afternoon. A mild day despite the cloud and breeze. Maximum temperature 19 °C.
Tonight 27 Sep Wales
Rain clear to the east this evening to leave a brighter end to the day. Turning chilly overnight under clear skies and lighter winds. Minimum temperature 4 °C.
Mertyn Temperature Statistics
September Temperature
Rhyl (16km)
Lowest 24 September, 2026
8 °CAverage September
15.4 °CHighest 6 September, 2026
24.3 °C
Climate (2021–2026)
Rhyl (16km)
Average Low 2021–2026
8.1 °CAverage 2021–2026
11.1 °CAverage High 2021–2026
14.2 °C