Heolgerrig Weather Forecast

    • 12
    • 16

    Heavy rain

    • 8
    • 18

    Cloudy

    • 15
    • 17

    Light rain

    • 13
    • 18

    Cloudy

    • 13
    • 18

    Light rain

    • 9
    • 16

    Cloudy

    • 10
    • 15

    Cloudy

Today 10 Sep Wales

Early bright spells will give way to increasing cloud and some rain from the west on Thursday morning, and this will lead into a rather wet and breezy afternoon. The strongest winds will be around coasts and over high ground. Maximum temperature 19 °C.

Tonight 10 Sep Wales

The heaviest of the rain will clear eastwards this evening, leaving showers for a time, these easing by dawn with some clearer spells. A milder night than the previous night. Minimum temperature 10 °C.

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Heolgerrig Temperature Statistics

September Temperature

St-athan (37km)

  • Lowest 9 September, 2026

    11.9 °C

  • Average September

    16.9 °C

  • Highest 6 September, 2026

    25.1 °C

Climate (2021–2026)

St-athan (37km)

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  • Average Low 2021–2026

    9 °C

  • Average 2021–2026

    11.9 °C

  • Average High 2021–2026

    14.8 °C
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