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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
Mon	Clear	Clear skies	1 5 °C	0mm	3 wsw	74% 1,010mb Good
Tue	Clear	Clear skies	1 6 °C	0mm	3 w	76% 1,010mb Good
Wed	Clear	Clear skies	1 5 °C	0mm	4 wsw	89% 1,013mb Good
Thu	Partly Cloudy Night	Partly cloudy skies	1 4 °C	0mm	5 w	93% 1,016mb Good
Fri	Partly Cloudy Night	Partly cloudy skies	1 4 °C	0mm	5 wsw	92% 1,015mb Good
Sat	Partly Cloudy Night	Partly cloudy skies	1 5 °C	0mm	6 w	94% 1,013mb Good
Sun	Clear	Clear skies	1 4 °C	0mm	5 w	82% 1,012mb Good
Mon	Clear	Clear skies	1 8 °C	0mm	7 wnw	86% 1,014mb Good
Tue	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

Temperature in San Francisco

San Francisco Average Temperature (degrees C)

Sunlight in San Francisco

Precipitation in San Francisco

San Francisco Average Precipitation (mm)

Humidity in San Francisco

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