Best year time to visit Glennan

General weather information about Glennan

Average annual temperature is 10.3 °C

Absolute maximum temperature: 25.9 °C

Absolute minimum temperature: -4.8 °C

Number of sunny days: 74 days

Number of rainy days: 290 days

Number of snow days: 1 day

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* Weather data for Glennan Ireland is based on climate observations for 2026 year

Glennan air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)12.413.314.517.321.525.921.622.725.820.412.912.4
Average daytime temperature (°C)7.69.59.312.316.220.817.418.317.914.09.28.7
Average temperature (°C)5.37.06.18.512.116.314.414.914.211.06.56.8
Average night temperature (°C)3.14.02.94.57.411.311.311.510.68.23.54.6
Absolute minimum temperature (°C)-4.4-2.8-4.8-1.73.56.28.18.33.41.2-3.2-4.7

Glennan monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)8.010.012.015.016.017.017.015.013.011.09.07.0
Daylight mean duration (h)8.09.711.914.116.017.116.614.912.710.58.57.4
Daylight minimum duration (h)7.08.010.013.015.016.015.013.011.09.07.07.0
Sunshine mean duration (h)3.33.14.57.58.812.18.69.46.85.14.51.9
Precipitation (mm)6825117108536720312312610864134
Sunny days81232139124794
Rainy days231627281821302926242127
Snow days001000000000

Glennan - weather forecast by months

Glennan weather in januaryGlennan weather in februaryGlennan weather in marchGlennan weather in aprilGlennan weather in mayGlennan weather in juneGlennan weather in julyGlennan weather in augustGlennan weather in septemberGlennan weather in octoberGlennan weather in novemberGlennan weather in december

Best time to visit Glennan:

The best time to visit Glennan during the most sunny months:

  • May — 8.8(h)
  • June — 12.1(h)
  • July — 8.6(h)
  • August — 9.4(h)

Months with the longest average daylight duration in Glennan:

  • May — 16.0(h)
  • June — 17.1(h)
  • July — 16.6(h)

The largest precipitation sum in Glennan is at

  • July — 203(mm)
  • September — 126(mm)
  • December — 134(mm)

    • Weather forecast in the closest to Glennan admin centers

    Weather forecast in the closest towns to Glennan

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    Frequently asked questions

    When is the best time to visit Glennan?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Glennan.
    What is the weather like in Glennan?
    See average temperature, rainfall and daylight hours for Glennan by month in the table above.
    How many sunny days does Glennan have?
    The monthly weather statistics above show sunshine and rainfall patterns for Glennan throughout the year.