Weather in San Francisco

Best time to visit

San Francisco does not hit any extremes nor does it fluctuate too much, so visitors feel as if it has warm winters and cool summers. High season is May to October, when temperatures average between 18–22°C (64–71°F). But it can still feel distinctly chillier, due to the fog and ocean air. Thanks to the diversity of the local landscape, there are several micro-climates – the high hills are colder and the east side is sunnier. Snowfall is rare in winter but high rainfall and windy conditions are common in December and January.

Night

Weather (night) Temp (min night) Rain (mm) Wind (mph) Humidity Pressure Visibility
Sun
Clear
Clear skies
1
5
°C
0mm
3
wsw
74%
1,010mb
Good
Mon
Clear
Clear skies
1
6
°C
0mm
3
w
76%
1,010mb
Good
Tue
Clear
Clear skies
1
5
°C
0mm
4
wsw
89%
1,013mb
Good
Wed
Partly Cloudy Night
Partly cloudy skies
1
4
°C
0mm
5
w
93%
1,016mb
Good
Thu
Partly Cloudy Night
Partly cloudy skies
1
4
°C
0mm
5
wsw
92%
1,015mb
Good
Fri
Partly Cloudy Night
Partly cloudy skies
1
5
°C
0mm
6
w
94%
1,013mb
Good
Sat
Clear
Clear skies
1
4
°C
0mm
5
w
82%
1,012mb
Good
Sun
Clear
Clear skies
1
8
°C
0mm
7
wnw
86%
1,014mb
Good
Mon
Clear
Clear skies
1
6
°C
0mm
3
ssw
72%
1,011mb
Good
Last updated at 04:06, Tuesday 27 August
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Last updated: We update the weather data for San Francisco from our weather partner every four hours. The time the last update was received is detailed here.
Actual Forecast Location: We have 830+ weather locations on the worldtravelguide.net website. Where no exact location is available we have used the nearest appropriate forecast point.
Symbols indicate the predominant weather for the day in question, calculated based on a weighting of different types of weather. So if a day is forecast to be sunny with the possibility of a brief shower, then we will see a sunny or partly cloudy symbol rather than a rain cloud. For the purpose of this forecast, 'day' is the entire 24 our period 00:00 to 23:59
The maximum temperature is the highest temperature forecast between dawn and dusk, and the minimum temperature is the lowest temperature expected from dusk on the day in question to dawn the next day. The temperature is in °C, or Celsius.
Wind speed and direction are the conditions expected at midday. Wind direction is based on a 16 point compass. W, SW, SSW, etc. The wind direction states where the wind originates. Wind speed is listed in MPH or miles per hour.
Humidity levels indicates how much water vapour the air contains compared to the maximum it could contain at that temperature. As a general guide:
  • 0 to 30 is very low
  • 31 to 50 is low
  • 51 to 70 is moderate to low
  • 71 to 80 is moderate
  • 81 to 90 is moderate to high
  • 91 to 100 is high
Pressure is measured in millibars (mb)
Visibility based on whether the human eye can see the following distances:
  • Very poor - less than 1km
  • Poor - between 1km and 4km
  • Moderate - between 4km and 10km
  • Good - between 10km and 20km
  • Very good - between 20km and 40km
  • Excellent - more than 40km
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Temperature in San Francisco

San Francisco Average Temperature (degrees C)

Sunlight in San Francisco

San Francisco Average Sunlight (hours)

Precipitation in San Francisco

San Francisco Average Precipitation (mm)

Humidity in San Francisco

San Francisco Humidity (AM and PM %)
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