Treharris Weather Forecast

    • 6
    • 11

    Cloudy

    • 7
    • 14

    Cloudy

    • 5
    • 12

    Overcast

    • 4
    • 10

    Cloudy

    • 5
    • 9

    Light rain

    • 4
    • 9

    Heavy rain

Today 30 Mar Wales

A few light showers are possible but otherwise mostly dry with easing winds. Some sunny spells and although still chilly, feeling more pleasant in lighter winds. Maximum temperature 13 °C.

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Treharris Temperature Statistics

March Temperature

St-athan (30km)

  • Lowest 14 March, 2026

    2.6 °C

  • Average March

    8.8 °C

  • Highest 18 March, 2026

    17.9 °C

Climate (2021–Present)

St-athan (30km)

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  • Average Low 2021–2026

    8.9 °C

  • Average 2021–2026

    11.8 °C

  • Average High 2021–2026

    14.6 °C
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