May Weather in Castletown, United Kingdom

Last updated: August 27, 2025

In Castletown, United Kingdom, the average temperature for May hovers around 10°C (50°F). During this time, temperatures can range from a chilly 0°C (32°F) to a warm 23°C (73°F). Expect approximately 67 mm (2.6 in) of precipitation spread over 16 days, all while enjoying an average humidity of 83%.

May Temperature in Castletown

In May in Castletown, the average temperature is 10°C (50°F), with maximums reaching 23°C (73°F) and minimums dropping as low as 0°C (32°F). This range makes it an ideal time for travelers to enjoy a variety of outdoor activities while still having the option to cozy up indoors in case of cooler days.

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

The chart illustrates May 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, May typically has an average temperature of 10°C (50°F), with highs reaching up to 23°C (73°F) and lows dropping to around 0°C (32°F).

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

May Precipitation in Castletown

In Castletown in May, the precipitation amount is 67 mm (2.6 in), spread over a duration of 16 days.

May Precipitation Trends in Castletown

The chart displays monthly precipitation patterns in Castletown, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Castletown, May typically receives around 67 mm (2.6 inches) of precipitation spread over approximately 16 days.

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

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Millimeters (mm) Inches (in)

May Humidity in Castletown

In Castletown in May, humidity is 83%. With an average temperature of 10°C (50°F), this humidity feels like a damp chill that clings to your skin, making outdoor exploration less comfortable and prompting visitors to seek cozy indoor activities.

May Average Humidity in Castletown

This chart illustrates the average monthly humidity levels in Castletown, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Castletown is approximately 83%, offering insight into how humid the weather typically is during this month.

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

May UV Index in Castletown

In Castletown in May, 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 Castletown.

Maximum UV Index Levels in Castletown for May

The chart shows the monthly maximum UV Index (UVI) for Castletown in May, 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 May, the maximum UV index in Castletown typically reaches 5, which falls under the moderate exposure category.

Data source: Castletown May 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 May 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 May’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 May’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