Sarn Weather Forecast

    • 12
    • 19

    Light rain

    • 12
    • 18

    Thunder shower

    • 14
    • 17

    Light rain

    • 13
    • 17

    Light rain shower

    • 12
    • 16

    Heavy rain shower

    • 12
    • 15

    Heavy rain shower

Today 7 Sep Wales

More settled on Friday and Saturday with a few light showers, but mainly dry with bright or sunny spells. Unsettled again on Sunday with outbreaks of rain and strong winds.

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Sarn Temperature Statistics

September Temperature

St-athan (18km)

  • Lowest 5 September, 2025

    11.6 °C

  • Average September

    15.9 °C

  • Highest 1 September, 2025

    19.5 °C

Climate (2020–Present)

St-athan (18km)

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  • Average Low 2020–2025

    8.8 °C

  • Average 2020–2025

    11.6 °C

  • Average High 2020–2025

    14.5 °C
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