Cambridge Weather Summary September 2019 Based on 30 days' worth of half-hourly data recorded with rooftop sensors at the Computer Laboratory, Cambridge, U.K. Temperature (degrees C) Average: 13.5 Minimum: 2.4 (18 September 05:00) Maximum: 24.3 (12 September 15:00) Relative Humidity (%) Average: 71.2 Minimum: 10 (14 September 15:00) Maximum: 100 (01 September 05:00) Dew Point (degrees C) Average: 7.8 Minimum: -13.8 (05 September 12:30) Maximum: 19.2 (22 September 11:30) Atmospheric Pressure (mbar) Average: 1018.0 Minimum: 990 (29 September 13:00) Maximum: 1040 (13 September 21:00) Half-hourly Instantaneous Wind Speed (knots) Average: 4.3 Minimum: 0.0 (01 September 22:00) Maximum: 24.0 (27 September 13:00) Half-hourly Maximum Wind Speed (knots) Average: 11.7 Minimum: 0 (08 September 18:30) Maximum: 36 (28 September 09:00) Prevalent Wind Direction SW (29.6% of readings) Total Sunshine Hours 156.2 Total Rainfall mm 36.5