Merthyr Vale Weather Forecast

    • 4
    • 12

    Heavy rain

    • 3
    • 13

    Partly cloudy

    • 8
    • 13

    Cloudy

    • 6
    • 14

    Cloudy

    • 10
    • 14

    Light rain

    • 11
    • 16

    Heavy rain shower

Today 14 May Wales

Winds not as strong as Wednesday, but scattered, blustery showers continue with some with hail and thunder possible. Feeling cool with temperatures remaining below average for mid-May. Maximum temperature 13 °C.

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Merthyr Vale Temperature Statistics

May Temperature

St-athan (32km)

  • Lowest 11 May, 2026

    4.8 °C

  • Average May

    11.9 °C

  • Highest 9 May, 2026

    19.1 °C

Climate (2021–Present)

St-athan (32km)

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  • Average Low 2021–2026

    9 °C

  • Average 2021–2026

    11.8 °C

  • Average High 2021–2026

    14.6 °C
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