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World Travel Guide > Guides > North America > United States of America > California > San Francisco

San Francisco Weather

18°C

Local time San Francisco

Currency

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Weather in San Francisco

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.

Guidetype and fpcity weatherwtg_cforecast_table
Weather (day) Temp (max day) Rain (mm) Wind (mph) Humidity Pressure Visibility
Monday
Cloudy
Cloudy skies
18
°C
0.1
9
wsw
60-80%
1013 mb
good
Tuesday
Sunny
Sunny skies
20
°C
0
11
wsw
0-20%
1017 mb
good
Wednesday
Sunny
Sunny skies
21
°C
0
9
wsw
0-20%
1014 mb
good
Thursday
Sunny
Sunny skies
21
°C
0.6
11
sw
0-20%
1009 mb
good
Friday
Cloudy
Cloudy skies
19
°C
0.1
9
sw
60-80%
1010 mb
good
Saturday
Sunny
Sunny skies
21
°C
0
11
wsw
0-20%
1013 mb
good
Sunday
Sunny
Sunny skies
20
°C
0
11
wsw
0-20%
1013 mb
good
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Last updated: 2019-05-06 21:18:14
We update the weather data for 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.
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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