Slieve Gullion Weather Forecast

    • 9
    • 14

    Cloudy

    • 8
    • 13

    Cloudy

    • 7
    • 15

    Cloudy

    • 7
    • 15

    Partly cloudy

    • 5
    • 17

    Partly cloudy

    • 6
    • 15

    Sunny day

    • 8
    • 16

    Sunny day

Today 21 May Northern Ireland

Overnight rain soon clearing. Then mostly dry and cloudy during the morning. Rain will spread northeast across all parts for a time during the afternoon. Warm. Maximum temperature 20 °C.

Tonight 21 May Northern Ireland

Cloud and rain soon clearing north, then dry with a few clear spells in the evening. Cloud spreads east overnight. Minimum temperature 11 °C.

Graph Plots Open in Graphs

  • Temperature Forecast Met Office

  • Temperature Real-Time

Slieve Gullion Temperature Statistics

May Temperature

Glenanne (15km)

  • Lowest 6 May, 2026

    2.1 °C

  • Average May

    8.9 °C

  • Highest 1 May, 2026

    17.6 °C

Climate (2021–Present)

Glenanne (15km)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    6.9 °C

  • Average 2021–2026

    9.7 °C

  • Average High 2021–2026

    12.8 °C
Get WillyWeather+ to remove ads