Weather in Castleknock in May

General weather information about Castleknock

Average annual temperature is 11.1 °C

Absolute maximum temperature: 25.7 °C

Absolute minimum temperature: -3.8 °C

Number of sunny days: 97 days

Number of rainy days: 266 days

Number of snow days: 2 days

Look at detailed online map of Castleknock

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

Castleknock air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)14.014.116.018.820.125.621.723.625.721.714.513.4
Average daytime temperature (°C)8.610.310.312.816.820.018.619.218.915.010.29.5
Average temperature (°C)6.17.77.39.212.816.415.315.715.211.97.77.7
Average night temperature (°C)3.75.04.55.58.612.211.912.411.58.75.05.4
Absolute minimum temperature (°C)-3.8-2.2-2.3-0.74.78.08.79.55.31.7-2.0-2.3

Castleknock monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)8.010.012.014.016.017.016.015.013.011.09.07.0
Daylight mean duration (h)8.29.811.914.015.916.916.414.712.710.68.77.6
Daylight minimum duration (h)7.08.010.013.015.016.015.013.011.09.07.07.0
Sunshine mean duration (h)3.73.84.68.310.411.89.18.47.05.34.92.3
Precipitation (mm)6618128993866155981261175987
Sunny days11161513112488117
Rainy days191229251819292722231924
Snow days101000000000

Castleknock - weather forecast by months

Castleknock weather in januaryCastleknock weather in februaryCastleknock weather in marchCastleknock weather in aprilCastleknock weather in mayCastleknock weather in juneCastleknock weather in julyCastleknock weather in augustCastleknock weather in septemberCastleknock weather in octoberCastleknock weather in novemberCastleknock weather in december

Best time to visit Castleknock:

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

  • April — 8.3(h)
  • May — 10.4(h)
  • June — 11.8(h)
  • July — 9.1(h)
  • August — 8.4(h)

Months with the longest average daylight duration in Castleknock:

  • May — 15.9(h)
  • June — 16.9(h)
  • July — 16.4(h)

The largest precipitation sum in Castleknock is at

  • March — 128(mm)
  • July — 155(mm)
  • September — 126(mm)
  • October — 117(mm)

    • Weather forecast in the closest to Castleknock admin centers

    Weather forecast in the closest towns to Castleknock

    Explore Castleknock

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    Frequently asked questions

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