April Weather in Castletown, United Kingdom

Last updated: August 27, 2025

In Castletown, United Kingdom, the average temperature in April hovers around 7°C (45°F). Expect chilly nights with minimums dipping to -2°C (29°F), while the days can warm up to a pleasant 18°C (65°F). Be prepared for some rain as well, with an average precipitation of 55 mm (2.2 in) spread over 14 days. Additionally, the average humidity is a comfortable 81%, making this month a unique blend of cool temperatures and refreshing moisture.

April Temperature in Castletown

In April in Castletown, the average temperature is 7°C (45°F). Maximums can reach 18°C (65°F) and minimums can drop to as low as -2°C (29°F). Be prepared for a mix of mild and chilly weather when traveling this month.

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

The chart illustrates April temperature patterns in Castletown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castletown, April typically has an average temperature of 7°C (45°F), with highs reaching up to 18°C (65°F) and lows dropping to around -2°C (29°F).

Data source: Temperature data for Castletown generated using information from the Copernicus Climate Change Service.

April Precipitation in Castletown

In Castletown in April, the total precipitation amount is 55 mm (2.2 in) over a duration of 14 days.

April Precipitation Trends in Castletown

The chart displays monthly precipitation patterns in Castletown, 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 Castletown, April typically receives around 55 mm (2.2 inches) of precipitation spread over approximately 14 days.

Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

April Humidity in Castletown

In Castletown in April, humidity is 81%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill wrapping around you, making outdoor adventures slightly uncomfortable and requiring extra layers to stay warm while exploring.

April Average Humidity in Castletown

This chart illustrates the average monthly humidity levels in Castletown, 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 Castletown is approximately 81%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Castletown

In Castletown in April, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Castletown for better planning.

Maximum UV Index Levels in Castletown for April

The chart shows the monthly maximum UV Index (UVI) for Castletown 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 Castletown typically reaches 4, which falls under the moderate exposure category.

Data source: Castletown 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 Castletown Compares to Other Months

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

This table compares monthly weather conditions in Castletown, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (42°F)	57 mm (2.2 inches)	82%	low
February Weather	5°C (42°F)	62 mm (2.5 inches)	81%	low
March Weather	6°C (43°F)	72 mm (2.8 inches)	81%	moderate
April Weather	7°C (45°F)	55 mm (2.2 inches)	81%	moderate
May Weather	10°C (50°F)	67 mm (2.6 inches)	83%	moderate
June Weather	13°C (55°F)	70 mm (2.8 inches)	84%	high
July Weather	14°C (58°F)	74 mm (2.9 inches)	87%	high
August Weather	14°C (58°F)	79 mm (3.1 inches)	86%	high
September Weather	13°C (55°F)	109 mm (4.3 inches)	88%	moderate
October Weather	10°C (51°F)	112 mm (4.4 inches)	87%	moderate
November Weather	8°C (46°F)	92 mm (3.6 inches)	87%	low
December Weather	6°C (43°F)	71 mm (2.8 inches)	80%	low