Annual Weather Averages in London City Airport
London City Airport is 28 miles from Slough, so the actual climate in Slough can vary a bit.
Based on weather reports collected during 1992–2021.
All Year Climate & Weather Averages in Slough
High Temp: 72 °F
Low Temp: 39 °F
Mean Temp: 53 °F
Precipitation: 1.44"
Humidity: 75%
Dew Point: 45 °F
Wind: 17 mph
Pressure: 29.99 "Hg
Visibility: 6 mi
January Climate & Weather Averages in Slough
High Temp: 46 °F
Low Temp: 39 °F
Mean Temp: 43 °F
Precipitation: 1.61"
Humidity: 82%
Dew Point: 38 °F
Wind: 18 mph
Pressure: 30.00 "Hg
Visibility: 6 mi
February Climate & Weather Averages in Slough
High Temp: 47 °F
Low Temp: 39 °F
Mean Temp: 43 °F
Precipitation: 1.34"
Humidity: 78%
Dew Point: 37 °F
Wind: 18 mph
Pressure: 30.01 "Hg
Visibility: 6 mi
March Climate & Weather Averages in Slough
High Temp: 51 °F
Low Temp: 41 °F
Mean Temp: 46 °F
Precipitation: 1.07"
Humidity: 74%
Dew Point: 38 °F
Wind: 18 mph
Pressure: 30.02 "Hg
Visibility: 6 mi
April Climate & Weather Averages in Slough
High Temp: 57 °F
Low Temp: 45 °F
Mean Temp: 51 °F
Precipitation: 1.09"
Humidity: 69%
Dew Point: 41 °F
Wind: 17 mph
Pressure: 29.97 "Hg
Visibility: 6 mi
May Climate & Weather Averages in Slough
High Temp: 63 °F
Low Temp: 50 °F
Mean Temp: 56 °F
Precipitation: 1.10"
Humidity: 68%
Dew Point: 46 °F
Wind: 17 mph
Pressure: 29.99 "Hg
Visibility: 6 mi
June Climate & Weather Averages in Slough
High Temp: 69 °F
Low Temp: 56 °F
Mean Temp: 62 °F
Precipitation: 1.07"
Humidity: 68%
Dew Point: 51 °F
Wind: 17 mph
Pressure: 30.02 "Hg
Visibility: 6 mi
July Climate & Weather Averages in Slough
High Temp: 72 °F
Low Temp: 60 °F
Mean Temp: 66 °F
Precipitation: 1.30"
Humidity: 67%
Dew Point: 54 °F
Wind: 17 mph
Pressure: 29.99 "Hg
Visibility: 6 mi
August Climate & Weather Averages in Slough
High Temp: 71 °F
Low Temp: 59 °F
Mean Temp: 65 °F
Precipitation: 1.48"
Humidity: 69%
Dew Point: 55 °F
Wind: 16 mph
Pressure: 29.98 "Hg
Visibility: 6 mi
September Climate & Weather Averages in Slough
High Temp: 66 °F
Low Temp: 55 °F
Mean Temp: 61 °F
Precipitation: 1.50"
Humidity: 74%
Dew Point: 52 °F
Wind: 16 mph
Pressure: 30.02 "Hg
Visibility: 6 mi
October Climate & Weather Averages in Slough
High Temp: 59 °F
Low Temp: 50 °F
Mean Temp: 55 °F
Precipitation: 2.04"
Humidity: 80%
Dew Point: 48 °F
Wind: 17 mph
Pressure: 29.95 "Hg
Visibility: 6 mi
November Climate & Weather Averages in Slough
High Temp: 52 °F
Low Temp: 44 °F
Mean Temp: 48 °F
Precipitation: 1.74"
Humidity: 83%
Dew Point: 43 °F
Wind: 16 mph
Pressure: 29.93 "Hg
Visibility: 6 mi
December Climate & Weather Averages in Slough
High Temp: 47 °F
Low Temp: 40 °F
Mean Temp: 44 °F
Precipitation: 1.89"
Humidity: 84%
Dew Point: 39 °F
Wind: 18 mph
Pressure: 29.97 "Hg
Visibility: 6 mi