Cambridge Weather Summary September 2004 Based on 30 days' worth of half-hourly data recorded with rooftop sensors at the Computer Laboratory, Cambridge, U.K. Temperature (degrees C) Average: 16.0 Minimum: 3.6 (16 September 04:00) Maximum: 29.1 (04 September 10:30) Relative Humidity (%) Average: 74.6 Minimum: 32 (01 September 10:30) Maximum: 100 (08 September 03:00) Dew Point (degrees C) Average: 11.0 Minimum: 2.1 (16 September 06:30) Maximum: 17.6 (10 September 13:30) Atmospheric Pressure (mbar) Average: 1017.6 Minimum: 995 (14 September 06:30) Maximum: 1037 (07 September 21:00) Half-hourly Instantaneous Wind Speed (knots) Average: 7.0 Minimum: 0.0 (01 September 00:00) Maximum: 28.1 (14 September 11:00) Half-hourly Maximum Wind Speed (knots) Average: 15.3 Minimum: 0 (01 September 00:30) Maximum: 52 (14 September 11:30) Prevalent Wind Direction SW (38.5% of readings) Total Sunshine Hours 170.5 Total Rainfall mm 18.3