Cilfynydd Weather Forecast

    • 11
    • 18

    Cloudy

    • 15
    • 22

    Cloudy

    • 13
    • 20

    Partly cloudy

    • 14
    • 17

    Light rain shower

    • 13
    • 18

    Light rain shower

    • 13
    • 18

    Cloudy

    • 12
    • 18

    Sunny day

Today 28 Sep Wales

A dry and fine day ahead with lengthy sunny periods. Sunshine may turn hazy at times throughout the day, with a low risk of an isolated light shower. Feeling pleasantly warm in the sunshine and light winds. Maximum temperature 19 °C.

Tonight 28 Sep Wales

Dry with clear skies to start the night, however cloud will increase from the south after midnight, with a risk of patchy rain by dawn. Southeasterly winds increasing overnight. Minimum temperature 5 °C.

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Cilfynydd Temperature Statistics

September Temperature

St-athan (25km)

  • Lowest 26 September, 2026

    8.9 °C

  • Average September

    16.5 °C

  • Highest 6 September, 2026

    25.1 °C

Climate (2021–2026)

St-athan (25km)

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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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