Cambridge Weather Summary September 2020 Based on 30 days' worth of half-hourly data recorded with rooftop sensors at the Computer Laboratory, Cambridge, U.K. Temperature (degrees C) Average: 13.7 Minimum: 4.4 (10 September 05:30) Maximum: 29.1 (15 September 15:00) Relative Humidity (%) Average: 73.1 Minimum: 13 (01 September 12:30) Maximum: 100 (01 September 00:00) Dew Point (degrees C) Average: 8.4 Minimum: -11.0 (28 September 14:30) Maximum: 19.3 (08 September 17:00) Atmospheric Pressure (mbar) Average: 1016.8 Minimum: 991 (24 September 18:00) Maximum: 1033 (16 September 21:30) Half-hourly Instantaneous Wind Speed (knots) Average: 3.7 Minimum: 0.0 (01 September 00:00) Maximum: 28.0 (27 September 07:30) Half-hourly Maximum Wind Speed (knots) Average: 10.6 Minimum: 0 (01 September 00:00) Maximum: 40 (25 September 16:30) Prevalent Wind Direction SW (34.9% of readings) Total Sunshine Hours 152.4 Total Rainfall mm 1.1