Mountain Ash Weather Forecast

    • 7
    • 7

    Light rain

    • 9
    • 13

    Light rain

    • 5
    • 11

    Light rain shower

    • 1
    • 8

    Partly cloudy

    • 5
    • 8

    Cloudy

    • 6
    • 10

    Heavy rain

Today 26 Nov Wales

A dry and cold start but any brightness in the east short-lived. Occasional rain arriving by lunchtime and turning increasingly wet and breezy through the afternoon. Chilly, but milder later. Maximum Temperature 8C.

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Mountain Ash Temperature Statistics

November Temperature

St-athan (31km)

  • Lowest 21 November, 2025

    -1.3 °C

  • Average November

    10.2 °C

  • Highest 5 November, 2025

    15.9 °C

Climate (2020–Present)

St-athan (31km)

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  • Average Low 2020–2025

    8.8 °C

  • Average 2020–2025

    11.7 °C

  • Average High 2020–2025

    14.5 °C
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