September in Davis averages a daily high of 32.4°C with nights around 13°C. Rain is rare — about 0.8 wet days and 4.8mm across the month. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Davis is April–May.
Based on DAVIS 2 WSW EXPERIMENTAL FARM, CA US (3.3km), 1995–2024. 28 years of September data.