August Weather in London, United States

Last updated: June 24, 2025

In August, the average temperature in London, United States is a warm 26°C (80°F). Expect a range where the minimum dips to 17°C (62°F) and the maximum can soar up to 37°C (99°F). This month also brings an average precipitation of 127 mm (5.0 in) over roughly 12 days, coupled with an average humidity of 61%. Enjoy the warmth while staying prepared for occasional showers!

August Temperature in London

In August in London, the average temperature is 26°C (80°F). The maximum can reach 37°C (99°F), while the minimum can drop to as low as 17°C (62°F). This varying climate makes it a great time for travelers to enjoy both warm days and cooler evenings.

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

The chart illustrates August 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, August typically has an average temperature of 26°C (80°F), with highs reaching up to 37°C (99°F) and lows dropping to around 17°C (62°F).

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

August Precipitation in London

In London in August, the precipitation amount is 127 mm (5.0 in) occurring over the course of 12 days.

August Precipitation Trends in London

The chart displays monthly precipitation patterns in London, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In London, August typically receives around 127 mm (5.0 inches) of precipitation spread over approximately 12 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

August Humidity in London

In London in August, humidity is 61%. With an average temperature of 26°C (80°F), this humidity feels like a sweltering embrace, making outdoor activities a bit uncomfortable and requiring frequent breaks in the shade.

August Average Humidity in London

This chart illustrates the average monthly humidity levels in London, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in London is approximately 61%, offering insight into how humid the weather typically is during this month.

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

August UV Index in London

In London in August, 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 August

The chart shows the monthly maximum UV Index (UVI) for London in August, 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 August, the maximum UV index in London typically reaches 10, which falls under the very high exposure category.

Data source: London August 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 August 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 August’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 August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (41°F)	88 mm (3.4 inches)	82%	moderate
February Weather	7°C (44°F)	135 mm (5.3 inches)	79%	high
March Weather	12°C (54°F)	140 mm (5.5 inches)	77%	very high
April Weather	15°C (60°F)	150 mm (5.9 inches)	78%	very high
May Weather	21°C (70°F)	198 mm (7.8 inches)	82%	very high
June Weather	26°C (78°F)	122 mm (4.8 inches)	81%	extreme
July Weather	27°C (82°F)	86 mm (3.4 inches)	75%	extreme
August Weather	26°C (80°F)	127 mm (5.0 inches)	61%	very high
September Weather	24°C (76°F)	65 mm (2.6 inches)	59%	very high
October Weather	17°C (64°F)	103 mm (4.1 inches)	69%	high
November Weather	10°C (51°F)	88 mm (3.4 inches)	82%	moderate
December Weather	8°C (46°F)	100 mm (3.9 inches)	87%	moderate