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April Weather in Castletroy, Ireland

Last updated: August 23, 2025

In April, the average temperature in Castletroy, Ireland hovers around 9°C (48°F), with a range that can dip to a chilly -2°C (28°F) and soar up to a comfortable 21°C (70°F). Expect 57 mm (2.3 in) of precipitation spread over 11 days, and the month brings a high average humidity of 86%.

April Temperature in Castletroy

In April in Castletroy, the average temperature is 9°C (48°F). Maximums can reach 21°C (70°F) and minimums can be as low as -2°C (28°F). This diverse range of temperatures makes Castletroy a great destination for travelers looking to experience both mild and cooler weather.

April Weather in Castletroy: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Castletroy, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castletroy, April typically has an average temperature of 9°C (48°F), with highs reaching up to 21°C (70°F) and lows dropping to around -2°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec424344485357605956514644
Data source: Temperature data for Castletroy generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

April Precipitation in Castletroy

In Castletroy in April, the total precipitation amount is 57 mm (2.3 in) over the course of 11 days.

April Precipitation Trends in Castletroy

The chart displays monthly precipitation patterns in Castletroy, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Castletroy, April typically receives around 57 mm (2.3 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec72117104577372791208510295119
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Castletroy

In Castletroy in April, humidity is 86%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill that wraps around you, making outdoor activities uncomfortable and travel less enjoyable.

April Average Humidity in Castletroy

This chart illustrates the average monthly humidity levels in Castletroy, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Castletroy is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%87%86%83%83%85%85%88%91%92%89%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Castletroy

In Castletroy in April, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Castletroy.

Maximum UV Index Levels in Castletroy for April

The chart shows the monthly maximum UV Index (UVI) for Castletroy in April, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In April, the maximum UV index in Castletroy typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875421
Data source: Castletroy April UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How April Weather in Castletroy Compares to Other Months

Weather in Castletroy varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Castletroy, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Castletroy, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)71 mm (2.8 inches)88%low
February Weather6°C (43°F)117 mm (4.6 inches)88%low
March Weather7°C (44°F)104 mm (4.1 inches)87%moderate
April Weather9°C (48°F)57 mm (2.3 inches)86%moderate
May Weather11°C (53°F)73 mm (2.9 inches)83%high
June Weather14°C (57°F)72 mm (2.8 inches)83%very high
July Weather16°C (61°F)79 mm (3.1 inches)85%very high
August Weather15°C (59°F)120 mm (4.7 inches)85%high
September Weather13°C (56°F)85 mm (3.4 inches)88%moderate
October Weather10°C (51°F)102 mm (4.0 inches)91%moderate
November Weather8°C (46°F)95 mm (3.8 inches)92%low
December Weather7°C (44°F)118 mm (4.7 inches)89%low

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