Merthyr Tydfil Weather Forecast

    • 7
    • 12

    Sunny day

    • 6
    • 12

    Cloudy

    • 7
    • 11

    Light rain

    • 5
    • 11

    Light rain

    • 8
    • 12

    Heavy rain shower

    • 6
    • 10

    Light rain shower

Today 18 Oct Wales

Another sunny start on Sunday, with patchy cloud once again bubbling up during the day. A low chance of isolated showers in the far east. Remaining chilly, with light winds. Maximum temperature 13 °C.

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Merthyr Tydfil Temperature Statistics

October Temperature

Sennybridge (38 km)

  • Lowest 17 October, 2026

    0.3 °C

  • Average October

    11.1 °C

  • Highest 12 October, 2026

    17.9 °C

Climate (2021–2026)

Sennybridge (38 km)

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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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