San Francisco weather in September 2019

  • 22°C maximum daytime temperature in September in San Francisco22
    22°C max day temperature
  • 9 hours of sunshine per day
  • 2 days with some rainfall in September in San Francisco2
    2 days with some rainfall
  • 13°C minimum night-time temperature in September in San Francisco13
    13°C min night temperature
  • 12 hours of daylight per day in September in San Francisco12
    12 hours of daylight per day
  • No heat & humidity in September in San Francisco0
    No heat & humidity
  • 7 mm monthly rainfall in September in San Francisco7
    7 mm of monthly rainfall
  • UV (maximum) index 7 (High) in September in San Francisco7
    7 (High) UV index
  • 14°C sea temperature in September in San Francisco14
    14°C sea temperature

Going to San Francisco? Find the best month to visit San Francisco based on the weather.

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Expect 22°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in San Francisco in September. Check more long-term weather averages for San Francisco in September before you book your next holiday to California in 2019/2020.

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More about San Francisco

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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.

Metric (°C / mm)  |  Imperial (°F / inches)

Guide to San Francisco weather in September

The average maximum daytime temperature in San Francisco in September is a warm 22°C (72°F). The average night-time temperature is usually a cool 13°C (55°F). There are usually 9 hours of bright sunshine each day, which represents 73% of the 12 hours of daylight.

Expect 7mm (0.3 inches) of rainfall across the whole of September with 2 days with some rain falling. Maximum UV levels will be high (7 UV index) at midday when the skies are clear.

The average sea temperature in and around San Francisco in September is 14°C (57°F).

San Francisco sunrise & sunset times for September 2019

Browse the sunrise & sunset times for San Francisco in September 2019. Select a month to view San Francisco sunrise & sunset times for the next twelve months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Sunday, 1st September 2019 06:40 19:39
Monday, 2nd September 2019 06:40 19:38
Tuesday, 3rd September 2019 06:41 19:36
Wednesday, 4th September 2019 06:42 19:35
Thursday, 5th September 2019 06:43 19:33
Friday, 6th September 2019 06:44 19:32
Saturday, 7th September 2019 06:45 19:30
Sunday, 8th September 2019 06:46 19:28
Monday, 9th September 2019 06:46 19:27
Tuesday, 10th September 2019 06:47 19:25
Wednesday, 11th September 2019 06:48 19:24
Thursday, 12th September 2019 06:49 19:22
Friday, 13th September 2019 06:50 19:21
Saturday, 14th September 2019 06:51 19:19
Sunday, 15th September 2019 06:51 19:18
Monday, 16th September 2019 06:52 19:16
Tuesday, 17th September 2019 06:53 19:15
Wednesday, 18th September 2019 06:54 19:13
Thursday, 19th September 2019 06:55 19:11
Friday, 20th September 2019 06:56 19:10
Saturday, 21st September 2019 06:56 19:08
Sunday, 22nd September 2019 06:57 19:07
Monday, 23rd September 2019 06:58 19:05
Tuesday, 24th September 2019 06:59 19:04
Wednesday, 25th September 2019 07:00 19:02
Thursday, 26th September 2019 07:01 19:01
Friday, 27th September 2019 07:02 18:59
Saturday, 28th September 2019 07:02 18:57
Sunday, 29th September 2019 07:03 18:56
Monday, 30th September 2019 07:04 18:54
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Popular California destinations

Below are average maximum temperatures at popular destinations in California in September. Select a destination to see more weather parameters.

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