Old St Mellons Weather Forecast

    • 18
    • 25

    Sunny day

    • 13
    • 22

    Partly cloudy

    • 14
    • 21

    Sunny day

    • 15
    • 21

    Sunny day

    • 17
    • 23

    Cloudy

    • 17
    • 24

    Cloudy

    • 15
    • 22

    Light rain shower

Today 29 Jul Wales

A grey morning in the north and west with patchy drizzle. Warm sunny spells developing for the afternoon, especially in the south and east, staying cloudy in the west. Maximum temperature 25 °C.

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Old St Mellons Temperature Statistics

July Temperature

St-athan (26km)

  • Lowest 3 July, 2026

    11.1 °C

  • Average July

    19.6 °C

  • Highest 10 July, 2026

    31.9 °C

Climate (2021–2026)

St-athan (26km)

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  • Average Low 2021–2026

    9 °C

  • Average 2021–2026

    11.9 °C

  • Average High 2021–2026

    14.7 °C
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