California Weather in September

September in California sees daytime temperatures around 26°C (79°F) and lows of 14°C (57°F) at night. With around 104 mm (4.1 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in California in September

The climate data from previous years indicates about 8 days of rain, averaging 104 mm (4.1 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in California in September

Daytime temperatures in California reach 26°C (79°F) in September, dropping to 14°C (57°F) at night. Overall, the month follows a fairly predictable daily temperature pattern. Nights drop to around 14°C (57°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in California in September

The city usually sees around 230 hours of sunlight, indicating many sunny days , a great month for sightseeing.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. May, June, September and October typically offer the best weather for California.