Hillingdon Weather & Climate: Best Time to Visit

In Hillingdon, temperatures differ significantly between summer and winter months. Average daytime temperatures reach a comfortable 23°C (73°F) in July. In January, the coolest month of the year, temperatures drop to a chilly 9°C (48°F).

At night, temperatures range from around 14°C (57°F) in July to 3°C (37°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

On average, Hillingdon receives a reasonable amount of rain/snowfall, with an annual precipitation of 716 mm (28 in). Despite minor fluctuations, Hillingdon enjoys fairly consistent precipitation throughout the year. In November, you can expect around 68 mm (2.7 in) of precipitation, while in March, Hillingdon receives about 48 mm (1.9 in). For more details, please visit our Hillingdon Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Hillingdon can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 7.3 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 1.8 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is high throughout the year in Hillingdon.

The city experiences its highest humidity in November, reaching 81%. In April, the humidity drops to its lowest level at 64%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year

The average wind speed over the year ranges from 3 m/s (6 knots) to 4 m/s (8 knots). It is lower in May, June, July, August, September, October and November and higher in January, February, March, April and December. What does this mean?

The mean monthly wind speed over the year (meters per second)