Castlewellan Weather Forecast

    • 12
    • 19

    Sunny day

    • 15
    • 18

    Cloudy

    • 14
    • 18

    Light rain

    • 13
    • 19

    Light rain

    • 12
    • 19

    Light rain shower

    • 11
    • 18

    Cloudy

    • 11
    • 17

    Partly cloudy

Today 24 Aug Northern Ireland

Fog patches soon clearing to leave a dry day with some warm sunshine, high cloud spilling north later. Maximum temperature 22 °C.

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Castlewellan Temperature Statistics

August Temperature

Glenanne (36km)

  • Lowest 22 August, 2026

    8.3 °C

  • Average August

    14.9 °C

  • Highest 13 August, 2026

    24.7 °C

Climate (2021–2026)

Glenanne (36km)

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  • Average Low 2021–2026

    6.9 °C

  • Average 2021–2026

    9.8 °C

  • Average High 2021–2026

    12.8 °C
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