May Weather in London, United States

Last updated: June 24, 2025

In May, the average temperature in London, United States is a pleasant 22°C (72°F). Temperatures can swing wildly, with a minimum of 8°C (47°F) and a scorching maximum of 41°C (105°F). Expect to see about 25 mm (1.0 in) of precipitation over 3 days, and enjoy a moderate average humidity level of 58%.

May Temperature in London

In May in London, the average temperature is 22°C (72°F). Maximums can reach 41°C (105°F), and minimums can drop as low as 8°C (47°F). Be prepared for a wide range of temperatures while traveling, ensuring you pack appropriately for both warm and cool conditions.

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 22°C (72°F), with highs reaching up to 41°C (105°F) and lows dropping to around 8°C (47°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 25 mm (1.0 in) over the course of 3 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 25 mm (1.0 inches) of precipitation spread over approximately 3 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 London

In London in May, humidity is 58%. With an average temperature of 22°C (72°F), this humidity feels like a warm, slightly muggy embrace, making it ideal for leisurely strolls but a bit uncomfortable for strenuous outdoor activities.

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 58%, 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 reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more 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 10, 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	10°C (51°F)	92 mm (3.6 inches)	82%	moderate
February Weather	11°C (53°F)	85 mm (3.3 inches)	85%	moderate
March Weather	14°C (57°F)	112 mm (4.4 inches)	80%	very high
April Weather	18°C (65°F)	44 mm (1.7 inches)	72%	very high
May Weather	22°C (72°F)	25 mm (1.0 inches)	58%	very high
June Weather	27°C (82°F)	1 mm (0.0 inches)	49%	extreme
July Weather	31°C (88°F)	0 mm (0.0 inches)	36%	extreme
August Weather	31°C (87°F)	0 mm (0.0 inches)	30%	very high
September Weather	27°C (80°F)	2 mm (0.1 inches)	42%	very high
October Weather	20°C (68°F)	16 mm (0.6 inches)	59%	high
November Weather	14°C (58°F)	45 mm (1.8 inches)	78%	moderate
December Weather	10°C (50°F)	76 mm (3.0 inches)	79%	moderate