Treharris Weather Forecast

    • 14
    • 24

    Cloudy

    • 14
    • 26

    Sunny day

    • 17
    • 29

    Sunny day

    • 17
    • 31

    Sunny day

    • 13
    • 25

    Sunny day

    • 13
    • 22

    Partly cloudy

Today 10 Aug Wales

A grey start in the south but this will gradually clear, leaving a fine and sunny day across the region. Feeling warm in the sunshine. Maximum temperature 25 °C.

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Treharris Temperature Statistics

August Temperature

St-athan (30km)

  • Lowest 7 August, 2026

    9.6 °C

  • Average August

    17.9 °C

  • Highest 3 August, 2026

    27.5 °C

Climate (2021–2026)

St-athan (30km)

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  • Average Low 2021–2026

    9 °C

  • Average 2021–2026

    11.9 °C

  • Average High 2021–2026

    14.8 °C
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