Mountain Ash Weather Forecast

    • 8
    • 20

    Cloudy

    • 9
    • 21

    Cloudy

    • 13
    • 24

    Sunny day

    • 14
    • 25

    Sunny day

    • 14
    • 25

    Sunny day

    • 15
    • 28

    Sunny day

    • 17
    • 29

    Sunny day

Today 6 Aug Wales

A risk of a few showers during the morning, but much of Wales becoming dry with sunny spells by the afternoon. Lighter winds than today with temperatures around average. Maximum temperature 20 °C.

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Mountain Ash Temperature Statistics

August Temperature

St-athan (31km)

  • Lowest 2 August, 2026

    12 °C

  • Average August

    19.1 °C

  • Highest 3 August, 2026

    27.5 °C

Climate (2021–2026)

St-athan (31km)

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  • Average Low 2021–2026

    9 °C

  • Average 2021–2026

    11.9 °C

  • Average High 2021–2026

    14.8 °C
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