Best year time to visit Castletown

General weather information about Castletown

Average annual temperature is 10.9 °C

Absolute maximum temperature: 25.9 °C

Absolute minimum temperature: -4.3 °C

Number of sunny days: 63 days

Number of rainy days: 301 days

Number of snow days: 1 day

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

Castletown air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)13.013.314.916.122.024.720.824.125.921.813.612.9
Average daytime temperature (°C)8.510.09.912.316.720.817.418.318.314.410.39.4
Average temperature (°C)6.17.57.18.912.616.614.615.214.711.48.17.5
Average night temperature (°C)3.74.94.35.48.312.211.812.411.38.85.95.3
Absolute minimum temperature (°C)-4.3-2.0-1.7-0.93.87.88.810.15.31.7-1.6-2.4

Castletown monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)9.010.012.014.016.016.016.015.013.011.09.08.0
Daylight mean duration (h)8.39.911.913.915.716.716.214.712.710.68.87.8
Daylight minimum duration (h)7.09.010.012.014.016.015.013.011.09.08.07.0
Sunshine mean duration (h)3.73.94.76.910.310.58.88.46.84.94.92.6
Precipitation (mm)822413569481202079816416781124
Sunny days81132108004584
Rainy days221728282122313126262227
Snow days100000000000

Castletown - weather forecast by months

Castletown weather in januaryCastletown weather in februaryCastletown weather in marchCastletown weather in aprilCastletown weather in mayCastletown weather in juneCastletown weather in julyCastletown weather in augustCastletown weather in septemberCastletown weather in octoberCastletown weather in novemberCastletown weather in december

Best time to visit Castletown:

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

  • May — 10.3(h)
  • June — 10.5(h)
  • July — 8.8(h)
  • August — 8.4(h)

Months with the longest average daylight duration in Castletown:

  • May — 15.7(h)
  • June — 16.7(h)
  • July — 16.2(h)

The largest precipitation sum in Castletown is at

  • July — 207(mm)
  • September — 164(mm)
  • October — 167(mm)

    • Weather forecast in the closest to Castletown admin centers

    Weather forecast in the closest towns to Castletown

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    Frequently asked questions

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