- Book flights to San Francisco from the UK with Virgin Atlantic
- Depart from London Heathrow Airport
- Join Flying Club & earn miles with every booking
San Francisco weather in September 2020
- 2222°C max day temperature
- 22 days with some rainfall
- 1313°C min night temperature
- 1212 hours of daylight per day
- 0No heat & humidity
- 77 mm of monthly rainfall
- 77 (High) UV index
- 1414°C sea temperature
The September weather guide for San Francisco, California shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
How hot is it in San Francisco in September?
Daytime temperatures usually reach 22°C in San Francisco in September, falling to 13°C at night.
How sunny is it in San Francisco in September?
There are normally 9 hours of bright sunshine each day in San Francisco in September - that's 73% of daylight hours.
How warm is the sea around San Francisco in September?
The average sea temperature around San Francisco in September is 14°C.
Does it ever rain in San Francisco in September?
There are usually 2 days with some rain in San Francisco in September and the average monthly rainfall is 7mm.
San Francisco sunrise & sunset times for September 2020
Browse the sunrise & sunset times for San Francisco in September 2020. Select a month to view San Francisco sunrise & sunset times for the next twelve months.
|Date||Sunrise times||Sunset times|
|Tuesday, 1st September 2020||06:40||19:38|
|Tuesday, 15th September 2020||06:52||19:16|
|Wednesday, 30th September 2020||07:05||18:53|
- Search for holiday accommodation in San Francisco, California
- Enter travel dates & number of guests or browse by map
- Filter homes by price, type, faciliities & more
Metric (°C / mm) | Imperial (°F / inches)
Discover more about San Francisco
Where's hot in California in September?
Below are average maximum temperatures at popular destinations in California in September. Select a destination to see more weather parameters.
- Death Valley
- Palm Springs
- Los Angeles
- Beverly Hills
- Santa Monica
- San Diego
- Santa Barbara
- Big Sur
- San Francisco
- Lake Tahoe
Get your weekly fix of holiday inspiration from some of the world's best travel writers plus save on your next trip with the latest exclusive offers
We promise not to share your details
Popular travel offers
*affiliate links: find out how we are funded and why this helps us remain free to use.