Best year time to visit Castlerock

General weather information about Castlerock

Average annual temperature is 10.5 °C

Absolute maximum temperature: 25.9 °C

Absolute minimum temperature: -3.0 °C

Number of sunny days: 61 days

Number of rainy days: 304 days

Look at detailed online map of Castlerock

* Weather data for Castlerock United Kingdom is based on climate observations for 2026 year

Castlerock air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)12.213.014.516.619.025.121.621.425.919.913.412.6
Average daytime temperature (°C)7.89.59.011.714.619.616.817.317.513.69.58.8
Average temperature (°C)6.17.56.58.811.516.014.414.914.511.47.77.2
Average night temperature (°C)4.25.04.25.78.412.312.212.611.79.35.25.5
Absolute minimum temperature (°C)-3.0-1.0-2.21.43.88.09.89.07.54.20.8-0.8

Castlerock 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)7.99.711.914.116.217.316.814.912.710.58.47.3
Daylight minimum duration (h)7.08.010.013.015.017.016.013.011.09.07.07.0
Sunshine mean duration (h)2.93.35.28.19.412.09.49.37.14.74.32.1
Precipitation (mm)8956113102658218611115212568193
Sunny days5937612004663
Rainy days261928232518313126252428
Snow days000000000000

Castlerock - weather forecast by months

Castlerock weather in januaryCastlerock weather in februaryCastlerock weather in marchCastlerock weather in aprilCastlerock weather in mayCastlerock weather in juneCastlerock weather in julyCastlerock weather in augustCastlerock weather in septemberCastlerock weather in octoberCastlerock weather in novemberCastlerock weather in december

Best time to visit Castlerock:

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

  • May — 9.4(h)
  • June — 12.0(h)
  • July — 9.4(h)
  • August — 9.3(h)

Months with the longest average daylight duration in Castlerock:

  • May — 16.2(h)
  • June — 17.3(h)
  • July — 16.8(h)

The largest precipitation sum in Castlerock is at

  • July — 186(mm)
  • September — 152(mm)
  • December — 193(mm)

    • Weather forecast in the closest to Castlerock admin centers

    Weather forecast in the closest towns to Castlerock

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    Frequently asked questions

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