Merthyr Tydfil Weather Forecast

    • 13
    • 17

    Heavy rain

    • 10
    • 19

    Cloudy

    • 15
    • 18

    Light rain

    • 14
    • 19

    Cloudy

    • 14
    • 19

    Light rain

    • 10
    • 17

    Cloudy

    • 12
    • 16

    Cloudy

Today 10 Sep Wales

Early bright spells will give way to increasing cloud and some rain from the west on Thursday morning, and this will lead into a rather wet and breezy afternoon. The strongest winds will be around coasts and over high ground. Maximum temperature 19 °C.

Tonight 10 Sep Wales

The heaviest of the rain will clear eastwards this evening, leaving showers for a time, these easing by dawn with some clearer spells. A milder night than the previous night. Minimum temperature 10 °C.

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Merthyr Tydfil Temperature Statistics

September Temperature

Sennybridge (38km)

  • Lowest 1 September, 2026

    7.9 °C

  • Average September

    14.2 °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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