Sarn Weather Forecast

    • -2
    • 7

    Partly cloudy

    • 1
    • 5

    Partly cloudy

    • 3
    • 7

    Overcast

    • 1
    • 5

    Partly cloudy

    • 0
    • 4

    Sunny day

    • 0
    • 4

    Sunny day

    • 0
    • 4

    Sunny day

Today 30 Dec Wales

Cloudy over the hills to start, with some drizzle in places. Otherwise a mostly dry day with sunnier spells developing more widely compared to recent days. Light winds but still feeling chilly. Maximum Temperature 6C.

Tonight 30 Dec Wales

Dry this evening with plenty of lengthy clear skies overnight. Turning colder with a widespread frost and some freezing fog patches. Minimum Temperature -4C.

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Sarn Temperature Statistics

December Temperature

St-athan (18km)

  • Lowest 17 December, 2025

    1 °C

  • Average December

    8.4 °C

  • Highest 9 December, 2025

    15.2 °C

Climate (2020–Present)

St-athan (18km)

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  • Average Low 2020–2025

    8.8 °C

  • Average 2020–2025

    11.7 °C

  • Average High 2020–2025

    14.5 °C
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