San Francisco, California 

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Climate in San Francisco, California

San Francisco, California gets 25 inches of rain, on average, per year. The US average is 38 inches of rain per year.

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

On average, there are 259 sunny days per year in San Francisco. The US average is 205 sunny days.

San Francisco gets some kind of precipitation, on average, 72 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 67 degrees
Winter Low: the January low is 46
Rain: averages 25 inches of rain a year
Snow: averages 0 inches of snow a year


SPERLING'S COMFORT INDEX
San Francisco ranks 84/100 for Comfort Index

A higher score indicates a more comfortable year-round climate. The US average for the comfort index is 54. Our index is based on the total number of days annually within the comfort range of 70-80 degrees, and we also applied a penalty for days of excessive humidity.

CLIMATE

Climate Averages
  San Francisco, CaliforniaUnited States
  24.6 in.38.1 in.
  0.0 in.27.8 in.
  72.3 days106.2 days
  259 days205 days
  67.2°85.8°
  45.5°21.7°
  8454
  5.44.3
  52 ft.2443 ft.

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 with an average high temperature of 69.9°, which ranks it as one of the coolest places in California. In San Francisco, there are 0 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for San Francisco are September, October and August.


January has the coldest nighttime temperatures for San Francisco with an average of 45.5°. This is one of the warmest places in California.


In San Francisco, there are 1.9 days annually when the high temperature is over 90°, which is one of the coolest places in California.


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


January is the wettest month in San Francisco with 4.8 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 57% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 24.6 inches in San Francisco means that it is wetter than most places in California.


December is the rainiest month in San Francisco with 11.7 days of rain, and July is the driest month with only 0.6 rainy days. There are 72.3 rainy days annually in San Francisco, 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, ranking it as one of the least snowy places in California.



Any measurable snowfall is a rare occurance in San Francisco.


CLIMATE MAP
  • Annual Rainfall (US Avg: 36.5")
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    Reviews for San Francisco    137 Reviews
    San Francisco ZERO quality of life (Not kidding) - 3/9/2019
    Lived here in San Francisco for 8 years now, and fed up with the whole city. I was lured in by a high salary and position at a tech company. I grew up poor in a small... Read More

    Start Your Review of San Francisco


    Unreal - 6/14/2018
    Drug needles all over the place. Homeless all over the place. Democrats stole public employees retirement funds. They put illegals like ms 13 over citizen. Yet sick pos... Read More

    sometimes warm often breezy --rarely too hot - 5/17/2014
    the City craves the hot weather but falls apart after two day, nobody can sleep they get bit to death by mosquitos at night when they open there windows for air and... Read More


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