Treharris Weather Forecast

    • 12
    • 14

    Heavy rain

    • 9
    • 14

    Cloudy

    • 8
    • 10

    Heavy rain

    • 7
    • 9

    Cloudy

    • 4
    • 8

    Cloudy

    • 2
    • 7

    Cloudy

Today 12 Nov Wales

A bright start in the north, but cloud and rain soon arriving to bring an unsettled afternoon across the country with heavy and persistent rain, especially in the south. Staying mild, but blustery winds along the coasts. Maximum Temperature 16C.

Tonight 12 Nov Wales

Rain continuing this evening, though not as heavy or persistent. Turning drier through the early hours with clear spells and lighter winds. Minimum Temperature 10C.

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Treharris Temperature Statistics

November Temperature

St-athan (30km)

  • Lowest 2 November, 2025

    8 °C

  • Average November

    12.6 °C

  • Highest 5 November, 2025

    15.9 °C

Climate (2020–Present)

St-athan (30km)

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  • Average Low 2020–2025

    8.8 °C

  • Average 2020–2025

    11.7 °C

  • Average High 2020–2025

    14.5 °C
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