Slough Weather & Climate: Best Time to Visit

The climate in Slough is known for significant temperature differences throughout the year, making the weather dynamic. 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 13°C (55°F) in July to 3°C (37°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Generally, Slough receives mid-range precipitation levels, with 719 mm (28 in) annually. Despite minor fluctuations, Slough enjoys fairly consistent precipitation throughout the year. In November, you can expect around 68 mm (2.7 in) of precipitation, while in March, Slough receives about 49 mm (1.9 in). For more details, please visit our Slough Precipitation page.

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

The average number of days each month with precipitation

Slough 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 Slough.

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 mean wind speed varies between 3 m/s (6 knots) and 4 m/s (8 knots) throughout the year. It is lowest in May, June, July, August, September, October and November and highest during January, February, March, April and December. What does this mean?

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