September in Cambridge averages a daily high of 20.4°C with nights around 10.5°C. Expect roughly 9.6 wet days totalling 42.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Cambridge is May–September.
Based on CAMBRIDGE B. GDNS, UK (1.3km), 1995–2024. 21 years of September data.