Merthyr Tydfil Weather Forecast

    • 9
    • 17

    Cloudy

    • 9
    • 19

    Partly cloudy

    • 10
    • 20

    Sunny day

    • 13
    • 21

    Partly cloudy

    • 15
    • 22

    Cloudy

    • 15
    • 20

    Light rain shower

    • 12
    • 19

    Heavy rain shower

Today 21 Aug Wales

Another showery day today, with some showers possibly thundery and bringing hail, occasionally merging into longer spells of rain. Sunny intervals are likely between showers, and it will feel fresher than recently. Maximum temperature 20 °C.

Tonight 21 Aug Wales

Showers gradually easing this evening, although a few may continue overnight, especially towards the north and west. Clearer skies will bring a chilly night, especially in rural areas. Minimum temperature 7 °C.

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Merthyr Tydfil Temperature Statistics

August Temperature

Sennybridge (38km)

  • Lowest 8 August, 2026

    3.5 °C

  • Average August

    16.4 °C

  • Highest 13 August, 2026

    31.8 °C

Climate (2021–2026)

Sennybridge (38km)

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  • Average Low 2021–2026

    5.7 °C

  • Average 2021–2026

    9.5 °C

  • Average High 2021–2026

    13 °C
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