Treharris Weather Forecast

    • 18
    • 25

    Sunny day

    • 18
    • 29

    Partly cloudy

    • 20
    • 31

    Sunny day

    • 22
    • 33

    Sunny day

    • 17
    • 32

    Light rain shower

    • 15
    • 23

    Partly cloudy

    • 14
    • 21

    Cloudy

Today 21 Jun Wales

Any early mist quickly clearing to leave a generally dry and bright day with plenty of sunny spells. An isolated light shower is possible for a time. Feeling very warm and increasingly humid. Maximum temperature 25 °C.

Tonight 21 Jun Wales

Any showers easing to leave a dry night with clear spells and light winds. Feeling warm and muggy, especially in urban areas, bringing difficult sleeping conditions. Minimum temperature 10 °C.

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Treharris Temperature Statistics

June Temperature

St-athan (30km)

  • Lowest 10 June, 2026

    9.7 °C

  • Average June

    14.9 °C

  • Highest 15 June, 2026

    22.5 °C

Climate (2021–2026)

St-athan (30km)

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  • Average Low 2021–2026

    9 °C

  • Average 2021–2026

    11.8 °C

  • Average High 2021–2026

    14.7 °C
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