Best year time to visit Castlewellan

General weather information about Castlewellan

Average annual temperature is 9.7 °C

Absolute maximum temperature: 24.4 °C

Absolute minimum temperature: -3.3 °C

Number of sunny days: 85 days

Number of rainy days: 276 days

Number of snow days: 4 days

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

Castlewellan air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)11.311.513.615.018.923.819.520.624.420.012.511.9
Average daytime temperature (°C)6.88.58.310.514.918.516.417.417.013.38.78.1
Average temperature (°C)4.86.55.57.611.315.213.514.213.910.96.36.3
Average night temperature (°C)2.84.32.94.77.611.710.711.310.98.74.04.4
Absolute minimum temperature (°C)-3.3-0.1-3.30.84.68.18.48.65.11.8-1.4-3.2

Castlewellan 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)8.09.811.914.116.017.116.614.812.710.58.57.4
Daylight minimum duration (h)7.08.010.013.015.016.015.013.011.09.07.07.0
Sunshine mean duration (h)3.84.14.78.49.712.08.89.67.24.94.72.2
Precipitation (mm)75181581206053179132141187101183
Sunny days9132510121179115
Rainy days211526252118303023221926
Snow days103000000000

Castlewellan - weather forecast by months

Castlewellan weather in januaryCastlewellan weather in februaryCastlewellan weather in marchCastlewellan weather in aprilCastlewellan weather in mayCastlewellan weather in juneCastlewellan weather in julyCastlewellan weather in augustCastlewellan weather in septemberCastlewellan weather in octoberCastlewellan weather in novemberCastlewellan weather in december

Best time to visit Castlewellan:

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

  • April — 8.4(h)
  • May — 9.7(h)
  • June — 12.0(h)
  • July — 8.8(h)
  • August — 9.6(h)

Months with the longest average daylight duration in Castlewellan:

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

The largest precipitation sum in Castlewellan is at

  • March — 158(mm)
  • July — 179(mm)
  • October — 187(mm)
  • December — 183(mm)

    • Weather forecast in the closest to Castlewellan admin centers

    Weather forecast in the closest towns to Castlewellan

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    Frequently asked questions

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