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May Weather in Mortlake, United Kingdom

Last updated: August 27, 2025

In May, the average temperature in Mortlake, United Kingdom hovers around 13°C (55°F), with lows dipping to 1°C (35°F) and highs reaching up to 25°C (78°F). During this time, expect around 62 mm (2.5 in) of precipitation spread over 11 days, contributing to an average humidity of 79%.

May Temperature in Mortlake

In May in Mortlake, the average temperature is 13°C (55°F). The maximum can reach 25°C (78°F), while the minimum can drop as low as 1°C (35°F). Be sure to pack layers for your trip, as temperatures can vary significantly throughout the day.

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

The chart illustrates May temperature patterns in Mortlake, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mortlake, May typically has an average temperature of 13°C (55°F), with highs reaching up to 25°C (78°F) and lows dropping to around 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec414345495562656459534643
Data source: Temperature data for Mortlake 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 Mortlake

In Mortlake in May, the precipitation amount is 62 mm (2.5 in), occurring over a span of 11 days.

May Precipitation Trends in Mortlake

The chart displays monthly precipitation patterns in Mortlake, 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 Mortlake, May typically receives around 62 mm (2.5 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec545354336277647045845284
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Mortlake

In Mortlake in May humidity is 79%. With an average temperature of 13°C (55°F), this humidity feels like a damp chill that permeates clothing, making outdoor activities slightly uncomfortable and prompting travelers to seek shelter or dress in layers to stay warm while adjusting to the moist air.

May Average Humidity in Mortlake

This chart illustrates the average monthly humidity levels in Mortlake, 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 Mortlake is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%86%85%79%81%71%76%82%91%92%92%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Mortlake

In Mortlake 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 Mortlake.

Maximum UV Index Levels in Mortlake for May

The chart shows the monthly maximum UV Index (UVI) for Mortlake 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 Mortlake typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578876421
Data source: Mortlake 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 Mortlake Compares to Other Months

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

This table compares monthly weather conditions in Mortlake, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)54 mm (2.1 inches)91%low
February Weather6°C (43°F)53 mm (2.1 inches)89%low
March Weather7°C (46°F)54 mm (2.1 inches)86%moderate
April Weather10°C (49°F)33 mm (1.3 inches)85%moderate
May Weather13°C (55°F)62 mm (2.5 inches)79%high
June Weather16°C (62°F)77 mm (3.0 inches)80%very high
July Weather18°C (65°F)64 mm (2.5 inches)71%very high
August Weather18°C (64°F)70 mm (2.7 inches)76%high
September Weather15°C (59°F)45 mm (1.8 inches)82%high
October Weather12°C (54°F)84 mm (3.3 inches)90%moderate
November Weather8°C (47°F)52 mm (2.0 inches)92%low
December Weather6°C (44°F)84 mm (3.3 inches)92%low

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