Cambridge Weather Summary September 2025 Based on 30 days' worth of half-hourly data recorded with rooftop sensors at the Computer Laboratory, Cambridge, U.K. Temperature (degrees C) Average: 13.1 Minimum: 0.8 (23 September 07:00) Maximum: 26.1 (19 September 17:00) Relative Humidity (%) Average: 86.0 Minimum: 86 (01 September 00:00) Maximum: 86 (01 September 00:00) Dew Point (degrees C) Average: 10.8 Minimum: -1.3 (23 September 07:00) Maximum: 23.5 (19 September 17:00) 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 0.1 Total Rainfall mm 23.7