Tonmawr Weather Forecast

    • 11
    • 15

    Heavy rain

    • 11
    • 16

    Partly cloudy

    • 15
    • 19

    Cloudy

    • 12
    • 18

    Heavy rain shower

    • 12
    • 16

    Light rain shower

    • 11
    • 16

    Light rain shower

Today 4 Sep Wales

Heavy, showery rain clearing eastwards through the morning, followed by sunny intervals and further scattered showers, some of these heavy and thundery. Breezy at times during the afternoon. Maximum Temperature 19C.

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Tonmawr Temperature Statistics

September Temperature

St-athan (34km)

  • Lowest 2 September, 2025

    14 °C

  • Average September

    16.3 °C

  • Highest 1 September, 2025

    19.5 °C

Climate (2020–Present)

St-athan (34km)

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  • Average Low 2020–2025

    8.8 °C

  • Average 2020–2025

    11.6 °C

  • Average High 2020–2025

    14.5 °C
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