July Weather in Brentford, United Kingdom

Last updated: August 27, 2025

In July in Brentford, United Kingdom, the average temperature hovers around 18°C (65°F), with a range that can dip to a cool 9°C (49°F) or soar to a high of 36°C (96°F). Expect about 64 mm (2.5 in) of precipitation spread over 11 days, contributing to an average humidity level of 71%.

July Temperature in Brentford

In July in Brentford, the average temperature is 18°C (65°F). Maximum temperatures can reach 36°C (96°F), while the minimum can drop as low as 9°C (49°F). This range makes it essential for travelers to pack layers to accommodate both warm days and cooler nights.

July Weather in Brentford: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in Brentford, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Brentford, July typically has an average temperature of 18°C (65°F), with highs reaching up to 36°C (96°F) and lows dropping to around 9°C (49°F).

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

July Precipitation in Brentford

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

July Precipitation Trends in Brentford

The chart displays monthly precipitation patterns in Brentford, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Brentford, July typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 11 days.

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

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Millimeters (mm) Inches (in)

July Humidity in Brentford

In Brentford in July humidity is 71%. With an average temperature of 18°C (65°F), this humidity feels like a warm embrace, making it a bit sticky and muggy, which can be slightly uncomfortable for traveling, especially if you're engaging in outdoor activities or exploring the city on foot.

July Average Humidity in Brentford

This chart illustrates the average monthly humidity levels in Brentford, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Brentford is approximately 71%, offering insight into how humid the weather typically is during this month.

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

July UV Index in Brentford

In Brentford in July, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Brentford.

Maximum UV Index Levels in Brentford for July

The chart shows the monthly maximum UV Index (UVI) for Brentford in July, 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 July, the maximum UV index in Brentford typically reaches 8, which falls under the very high exposure category.

Data source: Brentford July 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 July Weather in Brentford Compares to Other Months

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

This table compares monthly weather conditions in Brentford, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (41°F)	54 mm (2.1 inches)	91%	low
February Weather	6°C (43°F)	53 mm (2.1 inches)	89%	low
March Weather	7°C (46°F)	54 mm (2.1 inches)	86%	moderate
April Weather	10°C (49°F)	33 mm (1.3 inches)	85%	moderate
May Weather	13°C (55°F)	62 mm (2.5 inches)	79%	high
June Weather	16°C (62°F)	77 mm (3.0 inches)	80%	very high
July Weather	18°C (65°F)	64 mm (2.5 inches)	71%	very high
August Weather	18°C (64°F)	70 mm (2.7 inches)	76%	high
September Weather	15°C (59°F)	45 mm (1.8 inches)	82%	high
October Weather	12°C (54°F)	84 mm (3.3 inches)	90%	moderate
November Weather	8°C (47°F)	52 mm (2.0 inches)	92%	low
December Weather	6°C (44°F)	84 mm (3.3 inches)	92%	low