Merthyr Tydfil Weather Forecast

    • 9
    • 18

    Cloudy

    • 4
    • 14

    Cloudy

    • 3
    • 13

    Cloudy

    • 7
    • 13

    Cloudy

    • 5
    • 11

    Light rain shower

    • 4
    • 11

    Light rain shower

    • 4
    • 12

    Partly cloudy

Today 9 May Wales

A dry and sunny start, but cloud will tend to increase from the north throughout the day, with a scattering of showers developing. Showers potentially turning heavier into the afternoon. Feeling warm. Maximum temperature 20 °C.

Tonight 9 May Wales

Rather cloudy overnight with showery outbreaks of rain slowly clearing southwards during the night. Rather breezy, particularly near Bristol Channel coasts. Turning chilly in the north under clear spells. Minimum temperature 3 °C.

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Merthyr Tydfil Temperature Statistics

May Temperature

Sennybridge (38km)

  • Lowest 2 May, 2026

    5.8 °C

  • Average May

    9.7 °C

  • Highest 2 May, 2026

    15.2 °C

Climate (2021–Present)

Sennybridge (38km)

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  • Average Low 2021–2026

    5.7 °C

  • Average 2021–2026

    9.3 °C

  • Average High 2021–2026

    12.8 °C
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