May Weather in London, Canada

Last updated: June 18, 2025

In London, Canada, the average temperature in May hovers around 14°C (57°F), offering a pleasant climate for outdoor activities. However, be prepared for a temperature range that can dip as low as -3°C (27°F) and soar up to 32°C (89°F). During this month, you can expect about 104 mm (4.1 in) of precipitation spread across 13 days, contributing to an average humidity of 82%. Make sure to pack accordingly!

May Temperature in London

In May, in London, the average temperature is 14°C (57°F). Maximums can reach 32°C (89°F), and minimums can drop as low as -3°C (27°F). This wide temperature range makes it essential for travelers to pack accordingly for both warm and chilly weather.

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

The chart illustrates May temperature patterns in London, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In London, May typically has an average temperature of 14°C (57°F), with highs reaching up to 32°C (89°F) and lows dropping to around -3°C (27°F).

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

May Precipitation in London

In London in May, the precipitation amount is 104 mm (4.1 in) over the course of 13 days.

May Precipitation Trends in London

The chart displays monthly precipitation patterns in London, 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 London, May typically receives around 104 mm (4.1 inches) of precipitation spread over approximately 13 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

May Humidity in London

In London in May, humidity is 82%. With an average temperature of 14°C (57°F), this humidity feels like a thick blanket enveloping you, making outdoor activities uncomfortable and travel more challenging due to the heavy, damp air.

May Average Humidity in London

This chart illustrates the average monthly humidity levels in London, 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 London is approximately 82%, 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 London

In London in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in London.

Maximum UV Index Levels in London for May

The chart shows the monthly maximum UV Index (UVI) for London 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 London typically reaches 9, which falls under the very high exposure category.

Data source: London 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 London Compares to Other Months

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

This table compares monthly weather conditions in London, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (25°F)	74 mm (2.9 inches)	90%	low
February Weather	-3°C (26°F)	78 mm (3.1 inches)	90%	moderate
March Weather	1°C (34°F)	78 mm (3.1 inches)	87%	moderate
April Weather	7°C (44°F)	105 mm (4.1 inches)	87%	very high
May Weather	14°C (57°F)	104 mm (4.1 inches)	82%	very high
June Weather	19°C (67°F)	105 mm (4.1 inches)	81%	very high
July Weather	22°C (72°F)	97 mm (3.8 inches)	79%	very high
August Weather	21°C (70°F)	108 mm (4.2 inches)	80%	very high
September Weather	17°C (64°F)	86 mm (3.4 inches)	81%	very high
October Weather	11°C (53°F)	124 mm (4.9 inches)	84%	moderate
November Weather	3°C (38°F)	91 mm (3.6 inches)	88%	moderate
December Weather	0°C (31°F)	72 mm (2.8 inches)	87%	low