Pontnewydd Weather Forecast

    • 14
    • 21

    Cloudy

    • 14
    • 21

    Cloudy

    • 9
    • 19

    Partly cloudy

    • 12
    • 18

    Cloudy

    • 11
    • 19

    Partly cloudy

    • 11
    • 19

    Partly cloudy

    • 12
    • 18

    Light rain shower

Today 21 Sep Wales

Eastern areas of Wales will be sunniest on Monday with western areas often much cloudier. Here the cloud could give the odd drizzly outbreak, mainly in the northwest. Light winds however and feeling warm in the east. Maximum temperature 21 °C.

Tonight 21 Sep Wales

Remaining cloud in the northwest but clearer in the south. Mist developing under clear skies in the south. A chilly night with grass frost possible. Minimum temperature 7 °C.

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Pontnewydd Temperature Statistics

September Temperature

St-athan (40km)

  • Lowest 10 September, 2026

    10.1 °C

  • Average September

    16.8 °C

  • Highest 6 September, 2026

    25.1 °C

Climate (2021–2026)

St-athan (40km)

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  • Average Low 2021–2026

    9.1 °C

  • Average 2021–2026

    12 °C

  • Average High 2021–2026

    14.8 °C
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