Cardiff Weather Forecast

    • 12
    • 21

    Cloudy

    • 14
    • 22

    Cloudy

    • 12
    • 20

    Cloudy

    • 13
    • 18

    Partly cloudy

    • 12
    • 19

    Light rain shower

    • 15
    • 19

    Partly cloudy

    • 16
    • 21

    Light rain

Today 23 Sep Wales

Overcast with outbreaks of rain, this locally heavy and persistent across the hills and mountains of north Wales. Risk of thunder and hail through the morning. Becoming drier and brighter from the west during the afternoon. Temperatures around average. Maximum temperature 20 °C.

Tonight 23 Sep Wales

A dry night to come with plenty of clear spells and light winds. Temperatures will drop quickly to low single figures in rural and sheltered spots. Grass frost likely. Minimum temperature 3 °C.

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Cardiff Temperature Statistics

September Temperature

St-athan (20km)

  • Lowest 10 September, 2026

    10.1 °C

  • Average September

    16.7 °C

  • Highest 6 September, 2026

    25.1 °C

Climate (2021–2026)

St-athan (20km)

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  • Average Low 2021–2026

    9.1 °C

  • Average 2021–2026

    12 °C

  • Average High 2021–2026

    14.8 °C
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