Old St Mellons Weather Forecast

    • 12
    • 20

    Cloudy

    • 15
    • 19

    Sunny day

    • 17
    • 23

    Sunny day

    • 15
    • 19

    Cloudy

    • 13
    • 18

    Light rain shower

    • 13
    • 17

    Partly cloudy

Today 4 Sep Wales

A wet start with some heavy rain around, though brightening up from the northwest through the morning to leave a fine afternoon. Breezy, and feeling fresher than recently. Maximum temperature 21 °C.

Graph Plots Open in Graphs

  • Temperature Forecast Met Office

  • Temperature Real-Time

Old St Mellons Temperature Statistics

September Temperature

St-athan (26km)

  • Lowest 1 September, 2026

    13 °C

  • Average September

    16.8 °C

  • Highest 1 September, 2026

    20.1 °C

Climate (2021–2026)

St-athan (26km)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    9.1 °C

  • Average 2021–2026

    12 °C

  • Average High 2021–2026

    14.8 °C
Get WillyWeather+ to remove ads