Merthyr Tydfil Weather Forecast

    • 10
    • 18

    Cloudy

    • 13
    • 18

    Partly cloudy

    • 14
    • 22

    Partly cloudy

    • 11
    • 17

    Cloudy

    • 9
    • 16

    Partly cloudy

    • 10
    • 15

    Cloudy

    • 12
    • 16

    Cloudy

Today 4 Sep Wales

Friday will start wet with some heavy rain around, coupled with breezy conditions at times. Skies will brighten from the northwest through the morning, leaving sunny spells and isolated showers in the afternoon. Staying breezy, and feeling fresher than recently. Maximum temperature 20 °C.

Tonight 4 Sep Wales

The odd shower may affect north Wales overnight, but most places will be dry and there will be clear periods. Winds easing, and turning chilly in some rural spots. Minimum temperature 9 °C.

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Merthyr Tydfil Temperature Statistics

September Temperature

Sennybridge (38km)

  • Lowest 1 September, 2026

    7.9 °C

  • Average September

    14.5 °C

  • Highest 2 September, 2026

    17.8 °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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