Merthyr Tydfil Weather Forecast

    • 11
    • 17

    Partly cloudy

    • 8
    • 17

    Heavy rain

    • 11
    • 16

    Cloudy

    • 15
    • 20

    Overcast

    • 11
    • 18

    Light rain shower

    • 10
    • 16

    Light rain shower

    • 10
    • 16

    Light rain shower

Today 26 Sep Wales

Staying largely dry across Wales today with fine spells of sunshine. There is a small chance of the odd shower in the afternoon, but staying dry and pleasantly warm for many. Maximum temperature 19 °C.

Tonight 26 Sep Wales

Skies remaining clear at first tonight, and turning chilly. A few mist and fog patches possible. Cloud increasing a little towards the end of the night. Minimum temperature 4 °C.

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Merthyr Tydfil Temperature Statistics

September Temperature

Sennybridge (38km)

  • Lowest 24 September, 2026

    3.9 °C

  • Average September

    14 °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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