Grangetown Weather Forecast

    • 16
    • 31

    Sunny day

    • 17
    • 28

    Sunny day

    • 19
    • 28

    Partly cloudy

    • 19
    • 28

    Partly cloudy

    • 19
    • 26

    Sunny day

    • 18
    • 24

    Partly cloudy

Today 12 Jul Wales

Another very hot, dry and sunny day for most with strong sunshine and brisk winds. A chance of a few afternoon showers. Windy around the coast. Maximum temperature 31 °C.

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Grangetown Temperature Statistics

July Temperature

St-athan (18km)

  • Lowest 3 July, 2026

    11.1 °C

  • Average July

    18.8 °C

  • Highest 10 July, 2026

    31.9 °C

Climate (2021–2026)

St-athan (18km)

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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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