Castlereagh Weather Forecast

    • 4
    • 6

    Cloudy

    • -2
    • 6

    Partly cloudy

    • 2
    • 4

    Cloudy

    • 2
    • 6

    Cloudy

    • 0
    • 5

    Sunny day

    • -1
    • 4

    Partly cloudy

Today 29 Dec Northern Ireland

Any fog patches clearing by early afternoon. Otherwise it will be a dry day with a few bright or sunny spells. Cold. Maximum Temperature 5C.

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Castlereagh Temperature Statistics

December Temperature

Aldergrove (23km)

  • Lowest 16 December, 2025

    0.3 °C

  • Average December

    7.1 °C

  • Highest 9 December, 2025

    14.6 °C

Climate (2020–Present)

Aldergrove (23km)

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  • Average Low 2020–2025

    7.4 °C

  • Average 2020–2025

    10.3 °C

  • Average High 2020–2025

    13.3 °C
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