Treharris Weather Forecast

    • 12
    • 23

    Cloudy

    • 15
    • 23

    Partly cloudy

    • 12
    • 25

    Partly cloudy

    • 13
    • 24

    Sunny day

    • 12
    • 24

    Partly cloudy

    • 13
    • 24

    Partly cloudy

    • 14
    • 22

    Cloudy

Today 19 Jul Wales

Partly cloudy this morning with some sunny spells. Cloud will thicken across parts of south Wales, perhaps bringing a few showers this afternoon. Very warm in the sunshine. Maximum temperature 24 °C.

Tonight 19 Jul Wales

Cloud will gradually fade to give a fine end to the day with some late sunshine. Staying dry overnight with clear skies and light winds. Minimum temperature 13 °C.

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Treharris Temperature Statistics

July Temperature

St-athan (30km)

  • Lowest 3 July, 2026

    11.1 °C

  • Average July

    20 °C

  • Highest 10 July, 2026

    31.9 °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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