Castlereagh Weather Forecast

    • 5
    • 9

    Cloudy

    • 4
    • 7

    Cloudy

    • 5
    • 7

    Heavy rain

    • 5
    • 7

    Light rain

    • 4
    • 7

    Cloudy

    • 5
    • 7

    Cloudy

    • 4
    • 6

    Overcast

Today 28 Jan Northern Ireland

A mostly dry morning with bright or sunny intervals. Many parts staying dry with bright intervals through the afternoon, but a few showers possible. Breezy at times, especially around the coasts. Maximum temperature 9 °C.

Tonight 28 Jan Northern Ireland

A dry evening with cloud breaking up allowing longer clear spells to develop. Remaining dry overnight with clear spells before turning cloudier again towards morning. Breezy around the coasts. Minimum temperature 4 °C.

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Castlereagh Temperature Statistics

January Temperature

Aldergrove (23km)

  • Lowest 5 January, 2026

    -2.9 °C

  • Average January

    4.6 °C

  • Highest 11 January, 2026

    11 °C

Climate (2021–Present)

Aldergrove (23km)

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  • Average Low 2021–2026

    7.4 °C

  • Average 2021–2026

    10.4 °C

  • Average High 2021–2026

    13.4 °C
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