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What is the Weather in San Francisco in August?

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This post is a summary of the August weather in San Francisco, with average temperature and rainfall expectations, tips on how to dress, and things to do.  


Skies are sunny and the weather is comfortable with afternoon temperatures tending to average around 70 F (21 C).  

A few of the warmer afternoons could reach into the upper-70s F to low-80s F (26-27 C) while a few of the cooler afternoons will only in the mid-60s F (18-20 C).  

August Temperatures San Francisco

Late night and early morning low temperatures tend to average in the mid to upper 50s F (13-15 C) with a couple of the cooler mornings dipping down in the mid to lower 50s F (12-13 C).  

Average August Low Temperatures San Francisco

The all-time record low temperature in San Francisco during August is 48 F (9 C) while the hottest temperature was 98 F (36 C)


Most of the time you will encounter either clear or partly sunny skies this month as only about 2-3 days will be cloudy.  

Rain in August in San Francisco

August is a dry month with only 1 day this month likely to record any rainfall at all. 

San Francisco can be a bit breezy with the average wind speed mostly between 10-15 mph.


In a word, no. San Francisco averages 0.06 inches (1.5 mm) of rain all month in August. Bringing an umbrella will almost certainly be unnecessary.

Obviously, you should double check the weather report before arriving, but you can be almost certain that it will not rain much at all during the month.


August is a bit of a tricky month. Because on the days when it is sunny and the wind isn't blowing, it can easily get into the mid-80s F (30 C).

But if the fog is covering the city and the wind starts blowing, the temperature can quickly get down to 60 F (16 C) and very chilly!

What to Wear in August in San Francisco

The average wind speed in August is about 10 mph (17 kph). And it can frequently be even windier than that!

The best idea for this month is to wear layers. Leave your hotel wearing at least a t-shirt and perhaps a light sweatshirt, as well as long pants.

It is also a good idea to bring a light jacket to carry around with you, as well as earmuffs or a scarf if the wind bothers you. 


There are more things to do in August than we can list here, so be sure to read our full post on what to do and see this month, as well as our master post for any time of the year. Below are our top choices.

And if you are planning on visiting many of San Francisco's top attractions, then you should consider a tourist discount pass as you could save up to 50% of retail ticket prices to tours, attractions, and restaurants.

  1. See Ringo Starr in Concert
  2. Visit Alcatraz Prison
  3. Take A Walking Tour
  4. Watch a Giants or A's Baseball Game
  5. See Hamilton the Musical
  6. Attend Comic-Con
  7. Eat Drink SF
  8. Bridge to Bridge Run
  9. CabFest
  10. Golden Gate Bridge Swim

Find out more and read our full post on what to do and see this month.

Seasonal Outlook

July to September 2022 San Francisco

There is a 72% chance for normal to above normal temperatures with near normal rainfall.

Written by Fred Pickhardt

Ocean Weather Services

About The Author

Fred Pickhardt

Fred is a marine meteorologist and sailed briefly with American Export Lines in the Far East trade. He has extensive experience in weather analysis, weather forecasting, and forensic weather event reconstructions. Fred founded Ocean Weather Services and currently provides forensic marine weather reports to the maritime industry.
Updated: April 27th, 2022
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