Greencastle Weather Forecast

    • 13
    • 18

    Light rain

    • 11
    • 17

    Light rain

    • 10
    • 16

    Partly cloudy

    • 10
    • 18

    Cloudy

    • 10
    • 18

    Cloudy

    • 13
    • 18

    Partly cloudy

    • 15
    • 18

    Cloudy

Today 19 Aug Northern Ireland

A dry start in south and east, but occasionally heavy showers in north and west spreading across most areas, with the chance of thunder, showers may become slow to move away. Maximum temperature 18 °C.

Tonight 19 Aug Northern Ireland

Heavier showers dying out through the evening but some continuing through the night, perhaps drier in the south, feeling cooler with freshening northeasterly winds. Minimum temperature 9 °C.

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Greencastle Temperature Statistics

August Temperature

Glenanne (34km)

  • Lowest 2 August, 2026

    9.4 °C

  • Average August

    15.6 °C

  • Highest 13 August, 2026

    24.7 °C

Climate (2021–2026)

Glenanne (34km)

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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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