St Mellons Weather Forecast

    • 17
    • 21

    Cloudy

    • 16
    • 20

    Thunder shower

    • 15
    • 20

    Thunder shower

    • 15
    • 19

    Partly cloudy

    • 16
    • 19

    Light rain shower

    • 16
    • 20

    Cloudy

Today 28 Aug Wales

Showers continue in the south through the morning with more developing later elsewhere into the afternoon. Showers move eastwards leaving some sunny spells. Feeling warm. Maximum temperature 23 °C.

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St Mellons Temperature Statistics

August Temperature

St-athan (27km)

  • Lowest 7 August, 2026

    9.6 °C

  • Average August

    18.8 °C

  • Highest 12 August, 2026

    33.2 °C

Climate (2021–2026)

St-athan (27km)

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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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