March Weather in Castletown, Ireland

Last updated: August 23, 2025

In Castletown, Ireland, the average temperature in March hovers around 7°C (45°F), bringing a crispness to the air. Expect a minimum chill of -5°C (23°F), while the mercury may rise to a cozy 15°C (60°F). With an average precipitation of 79 mm (3.1 in) spread over 15 days and a humidity level of 86%, it's a month that embraces the full spectrum of weather. Prepare accordingly for both the cold and the damp!

March Temperature in Castletown

In March in Castletown, the average temperature is 7°C (45°F). Maximums can reach 15°C (60°F), while minimums can drop as low as -5°C (23°F). Be prepared for a mix of cool and brisk weather, ideal for layering your travel attire while exploring the area.

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

The chart illustrates March 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, March typically has an average temperature of 7°C (45°F), with highs reaching up to 15°C (60°F) and lows dropping to around -5°C (23°F).

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

March Precipitation in Castletown

In Castletown in March, the precipitation amount is 79 mm (3.1 in) spread over 15 days.

March Precipitation Trends in Castletown

The chart displays monthly precipitation patterns in Castletown, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Castletown, March typically receives around 79 mm (3.1 inches) of precipitation spread over approximately 15 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

March Humidity in Castletown

In Castletown in March, humidity is 86%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration a bit uncomfortable and necessitating cozy layers to stay warm while navigating the moist air.

March Average Humidity in Castletown

This chart illustrates the average monthly humidity levels in Castletown, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in Castletown is approximately 86%, offering insight into how humid the weather typically is during this month.

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

March UV Index in Castletown

In Castletown in March, 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 March

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

Data source: Castletown March 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 March 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 March’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 March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (43°F)	53 mm (2.1 inches)	85%	low
February Weather	6°C (44°F)	87 mm (3.4 inches)	86%	low
March Weather	7°C (45°F)	79 mm (3.1 inches)	86%	moderate
April Weather	8°C (47°F)	55 mm (2.2 inches)	85%	moderate
May Weather	11°C (52°F)	70 mm (2.8 inches)	83%	high
June Weather	14°C (57°F)	67 mm (2.6 inches)	85%	very high
July Weather	16°C (61°F)	68 mm (2.7 inches)	86%	very high
August Weather	15°C (60°F)	96 mm (3.8 inches)	85%	high
September Weather	14°C (57°F)	76 mm (3.0 inches)	86%	moderate
October Weather	11°C (52°F)	93 mm (3.6 inches)	87%	moderate
November Weather	8°C (47°F)	108 mm (4.3 inches)	86%	low
December Weather	7°C (44°F)	107 mm (4.2 inches)	84%	low