Merthyr Mawr Weather Forecast

    • 4
    • 9

    Light rain shower

    • 8
    • 10

    Partly cloudy

    • 7
    • 11

    Light rain

    • 7
    • 10

    Partly cloudy

    • 9
    • 10

    Light rain

    • 9
    • 12

    Cloudy

Today 25 Mar Wales

Sunshine and blustery showers on Wednesday. These heavy at times, with some hail, thunder and likely bringing some snow over the Welsh hills. Feeling cold in brisk northerly winds. Maximum temperature 9 °C.

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Merthyr Mawr Temperature Statistics

March Temperature

St-athan (14km)

  • Lowest 14 March, 2026

    2.6 °C

  • Average March

    9 °C

  • Highest 18 March, 2026

    17.9 °C

Climate (2021–2026)

St-athan (14km)

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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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