St Illtyd Weather Forecast

    • 7
    • 8

    Mist

    • 5
    • 8

    Cloudy

    • 2
    • 6

    Cloudy

    • 1
    • 3

    Overcast

    • 0
    • 3

    Partly cloudy

    • 2
    • 3

    Overcast

Today 21 Dec Wales

Cloudy in the north and east, with hill fog and some rain and drizzle possible at times. Drier and sunnier in the west, though tending to cloud over here later. Maximum Temperature 9C.

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St Illtyd Temperature Statistics

December Temperature

St-athan (40km)

  • Lowest 17 December, 2025

    1 °C

  • Average December

    9.6 °C

  • Highest 9 December, 2025

    15.2 °C

Climate (2020–Present)

St-athan (40km)

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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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