Tonmawr Weather Forecast

    • 15
    • 17

    Overcast

    • 13
    • 17

    Overcast

    • 9
    • 16

    Heavy rain

    • 6
    • 12

    Light rain shower

    • 4
    • 12

    Partly cloudy

    • 6
    • 13

    Partly cloudy

    • 7
    • 14

    Cloudy

Today 18 Sep Wales

A cloudy, damp and mild start to Thursday. Cloud breaking in the east but drizzle persisting over the hills in the west. Staying windy. Maximum Temperature 18C.

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Tonmawr Temperature Statistics

September Temperature

St-athan (34km)

  • Lowest 14 September, 2025

    10.1 °C

  • Average September

    15.6 °C

  • Highest 6 September, 2025

    22 °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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