San Francisco County, California 

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Climate in San Francisco County, California

San Francisco County, California gets 24 inches of rain, on average, per year. The US average is 38 inches of rain per year.

San Francisco County averages 0 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 260 sunny days per year in San Francisco County. The US average is 205 sunny days.

San Francisco County gets some kind of precipitation, on average, 71 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.


Weather Highlights

Summer High: the July high is around 68 degrees
Winter Low: the January low is 45
Rain: averages 24 inches of rain a year
Snow: averages 0 inches of snow a year


BESTPLACES COMFORT INDEX

The annual BestPlaces Comfort Index for San Francisco County is 8.5 (10=best), which means it is more comfortable than most places in California.

8.5 / 10
September, August and October are the most pleasant months in San Francisco County, while January and December are the least comfortable months.

Climate Averages
  San Francisco, CaliforniaUnited States
  24.3 in.38.1 in.
  0.0 in.27.8 in.
  71.3 days106.2 days
  260 days205 days
  67.6°85.8°
  45.3°21.7°
  8.57
  5.44.3
  206 ft.2443 ft.
CLIMATE

YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.


September is the hottest month for San Francisco County with an average high temperature of 70.2°, which ranks it as one of the coolest places in California. In San Francisco County, there are 1 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for San Francisco County are September, October and August.


January has the coldest nighttime temperatures for San Francisco County with an average of 45.3°. This is one of the warmest places in California.


In San Francisco County, there are 2.2 days annually when the high temperature is over 90°, which is one of the coolest places in California.


In San Francisco County, there are 0.3 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in California.


In San Francisco County, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in California.


December is the wettest month in San Francisco County with 4.7 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 58% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 24.3 inches in San Francisco County means that it is wetter than most places in California.


December is the rainiest month in San Francisco County with 11.5 days of rain, and July is the driest month with only 0.5 rainy days. There are 71.3 rainy days annually in San Francisco County, which is rainier than most places in California. The rainiest season is Spring when it rains 48% of the time and the driest is Autumn with only a 4% chance of a rainy day.


There is rarely any recorded snowfall in San Francisco County, ranking it as one of the least snowy places in California. Any measurable snowfall is a rare occurance in San Francisco County.





CLIMATE MAP
  • Annual Rainfall (US Avg: 36.5")
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    MAPS OF SAN FRANCISCO COUNTY, CALIFORNIA
    ZIP CODES IN SAN FRANCISCO COUNTY, CALIFORNIA
    94112, 94110, 94122, 94109, 94116, 94121, 94117, 94134, 94118, 94115, ... 27 more

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