Merthyr Tydfil Weather Forecast

    • 16
    • 20

    Light rain

    • 11
    • 17

    Partly cloudy

    • 12
    • 15

    Cloudy

    • 11
    • 15

    Light rain

    • 13
    • 15

    Cloudy

    • 11
    • 17

    Light rain

Today 14 Sep Wales

Largely cloudy skies on Monday with a few outbreaks of rain or drizzle possible at times. Some warm and humid brighter spells also likely in the afternoon. Maximum temperature 23 °C.

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Merthyr Tydfil Temperature Statistics

September Temperature

Sennybridge (38km)

  • Lowest 10 September, 2026

    5.1 °C

  • Average September

    13.8 °C

  • Highest 6 September, 2026

    23.2 °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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