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May Weather in Mullion, United Kingdom

Last updated: August 27, 2025

In May, the average temperature in Mullion, United Kingdom hovers around 12°C (54°F). Temperatures can dip as low as 6°C (42°F) and reach a pleasant 20°C (68°F). Visitors should also prepare for some moisture, as the area experiences approximately 64 mm (2.5 in) of precipitation spread over 11 days. With an average humidity of 85%, be ready for a refreshing atmosphere!

May Temperature in Mullion

In May in Mullion, the average temperature is 12°C (54°F). Maximums can reach 20°C (68°F), while minimums can dip as low as 6°C (42°F). This mild climate makes Mullion an ideal destination for travelers looking to enjoy pleasant weather and outdoor activities.

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

The chart illustrates May temperature patterns in Mullion, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mullion, May typically has an average temperature of 12°C (54°F), with highs reaching up to 20°C (68°F) and lows dropping to around 6°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec474848505459636260565250
Data source: Temperature data for Mullion 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.

May Precipitation in Mullion

In Mullion in May, the total precipitation amount is 64 mm (2.5 in) spread over 11 days.

May Precipitation Trends in Mullion

The chart displays monthly precipitation patterns in Mullion, 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 Mullion, May typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec739085466474705764120102123
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Mullion

In Mullion in May, humidity is 85%. With an average temperature of 12°C (54°F), this humidity feels like a heavy blanket wrapping around you, making traveling not only uncomfortable but also exhausting as the damp air clings to your skin and slows your movements.

May Average Humidity in Mullion

This chart illustrates the average monthly humidity levels in Mullion, 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 Mullion is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%84%82%83%85%85%85%85%84%84%82%81%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Mullion

In Mullion in May, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Mullion.

Maximum UV Index Levels in Mullion for May

The chart shows the monthly maximum UV Index (UVI) for Mullion 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 Mullion typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec234679886421
Data source: Mullion 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 Mullion Compares to Other Months

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

This table compares monthly weather conditions in Mullion, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)73 mm (2.9 inches)81%low
February Weather9°C (48°F)90 mm (3.5 inches)83%moderate
March Weather9°C (48°F)85 mm (3.4 inches)82%moderate
April Weather10°C (50°F)45 mm (1.8 inches)83%high
May Weather12°C (54°F)64 mm (2.5 inches)85%high
June Weather15°C (59°F)74 mm (2.9 inches)85%very high
July Weather17°C (63°F)70 mm (2.8 inches)85%very high
August Weather17°C (62°F)57 mm (2.3 inches)85%very high
September Weather16°C (60°F)64 mm (2.5 inches)84%high
October Weather13°C (56°F)120 mm (4.7 inches)84%moderate
November Weather11°C (52°F)102 mm (4.0 inches)82%low
December Weather10°C (50°F)123 mm (4.8 inches)81%low

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