Average weather in September in San Francisco (California), United States of America
The average minimum temperature (usually the minimum temperature is noted during the night) in San Francisco in September is 13.1°C (55.58°F).
The amount of rain in September is extremely low with an average of 3mm (0.1in).
It rains on average a total of 2 days.
You can expect very pleasant temperatures during the day.
The average maximum daytime temperature lies around 21.0°C (69.8°F).
This makes September the hottest month of the year.
If you enjoy looking at a blue sky and love the sun than this is a great time to go to San Francisco with 270 hours of sun.
September is known as one of the best months to visit San Francisco.
So what to wear in September? For visitors traveling to San Francisco we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. With a water temperature of around 14.0°C (57.2°F), there is no need to bring your swimwear.
No idea where to travel to this year? We now have a tool which suggests which destination suits your ideal climate conditions. Find out where to go with our weather planner.
For other monthly average weather and what to do in September look at the numbers below.
Monthly Averages in September
Show in Fahrenheit
Where to stay in San Francisco
Where to go in United States of America in SeptemberFind out more about the weather in United States of America in September and which places have the best weather conditions in this month.
What To Do
We rated the following activities from 1 (least suitable) to 10 (best) to do in September.
Weather Forecasts for San Francisco (California)
Interested in more climate information?
Weather and Climate provides you with all the information you need about the climate in San Francisco.
Our site offers climate and forecast data for almost all countries in the world. Are you going to United States of America? On this website you can find historical weather averages for many cities in United States of America. Not sure yet where to go? We now have a tool which suggests which destination suits your ideal climate conditions. Find out where to go with our weather planner.