July Weather in Hillingdon, United Kingdom

Last updated: August 27, 2025

In July, the average temperature in Hillingdon, United Kingdom hovers around 18°C (65°F). Expect a range of 9°C (48°F) as the minimum to a warm 35°C (96°F) maximum. During this month, you'll experience about 64 mm (2.5 in) of precipitation spread over 11 days, accompanied by an average humidity level of 71%.

July Temperature in Hillingdon

In July in Hillingdon, the average temperature is 18°C (65°F), with maximums reaching up to 35°C (96°F) and minimums dropping as low as 9°C (48°F). This makes it an ideal time for travelers to enjoy a variety of outdoor activities while being prepared for both warm days and cooler evenings.

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

The chart illustrates July temperature patterns in Hillingdon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hillingdon, July typically has an average temperature of 18°C (65°F), with highs reaching up to 35°C (96°F) and lows dropping to around 9°C (48°F).

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

July Precipitation in Hillingdon

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

July Precipitation Trends in Hillingdon

The chart displays monthly precipitation patterns in Hillingdon, 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 Hillingdon, 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 Hillingdon

In Hillingdon 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 Hillingdon

This chart illustrates the average monthly humidity levels in Hillingdon, 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 Hillingdon 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 Hillingdon

In Hillingdon 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 Hillingdon.

Maximum UV Index Levels in Hillingdon for July

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

Data source: Hillingdon 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 Hillingdon Compares to Other Months

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

This table compares monthly weather conditions in Hillingdon, 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)	52 mm (2.1 inches)	91%	low
February Weather	6°C (43°F)	52 mm (2.0 inches)	89%	low
March Weather	7°C (46°F)	55 mm (2.2 inches)	86%	moderate
April Weather	10°C (49°F)	33 mm (1.3 inches)	85%	moderate
May Weather	13°C (55°F)	63 mm (2.5 inches)	79%	high
June Weather	16°C (62°F)	74 mm (2.9 inches)	80%	very high
July Weather	18°C (65°F)	64 mm (2.5 inches)	71%	very high
August Weather	18°C (64°F)	67 mm (2.6 inches)	76%	high
September Weather	15°C (59°F)	45 mm (1.8 inches)	82%	high
October Weather	12°C (53°F)	86 mm (3.4 inches)	90%	moderate
November Weather	8°C (47°F)	53 mm (2.1 inches)	92%	low
December Weather	6°C (44°F)	82 mm (3.2 inches)	92%	low