Cambridge Weather Summary September 2026 Based on 3 days' worth of half-hourly data recorded with rooftop sensors at the Computer Laboratory, Cambridge, U.K. Temperature (degrees C) Average: 16.6 Minimum: 8.8 (01 September 06:00) Maximum: 23.9 (03 September 14:30) Relative Humidity (%) Average: 86.0 Minimum: 86 (01 September 00:00) Maximum: 86 (01 September 00:00) Dew Point (degrees C) Average: 14.2 Minimum: 6.6 (01 September 06:00) Maximum: 21.4 (03 September 14:30) Atmospheric Pressure (mbar) Average: 1000.0 Minimum: 1000 (01 September 00:00) Maximum: 1000 (01 September 00:00) Half-hourly Instantaneous Wind Speed (knots) Average: 0.0 Minimum: 0.0 (01 September 00:00) Maximum: 0.0 (01 September 00:00) Half-hourly Maximum Wind Speed (knots) Average: 0.0 Minimum: 0 (01 September 00:00) Maximum: 0 (01 September 00:00) Prevalent Wind Direction N (100.0% of readings) Total Sunshine Hours 0.0 Total Rainfall mm 0.6