Zip 94121 (San Francisco, CA) Climate


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94121 San Francisco, CA has a mild climate year-round. The summers are warm and sunny, while the winters tend to be cool and damp. Rain is common throughout the year, but it is usually light and doesn't last too long. Temperatures rarely drop below freezing or rise above 85 degrees Fahrenheit. The area typically experiences temperatures ranging from 40-60 degrees Fahrenheit in the winter and 70-80 degrees Fahrenheit in the summer. Humidity levels tend to stay low throughout the year, with average humidity at 60%.

San Francisco (zip 94121), California gets 28 inches of rain, on average, per year. The US average is 38 inches of rain per year.

San Francisco (zip 94121) 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 (zip 94121). The US average is 205 sunny days.

San Francisco (zip 94121) gets some kind of precipitation, on average, 78 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 44
Rain: averages 28 inches of rain a year
Snow: averages 0 inches of snow a year


Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the 94121 zip code is 8.3 (10=best), which means it is more comfortable than most places in California.

9 Summer - 7.5 Winter
September, August and October are the most pleasant months in the 94121 zip code, while January and December are the least comfortable months.

  ClimateSan Francisco, CaliforniaUnited States
  27.5 in.38.1 in.
  0.0 in.27.8 in.
  77.9 days106.2 days
  260 days205 days
  67.2°85.8°
  44.3°21.7°
  8.37
  5.44.3
  282 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 the 94121 zip code with an average high temperature of 69.5°, which ranks it as one of the coolest places in California. In the 94121 zip code, there are 0 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for the 94121 zip code are September, October and August.
In the 94121 zip code, there are 2.3 days annually when the high temperature is over 90°, which is one of the coolest places in California.
January has the coldest nighttime temperatures for the 94121 zip code with an average of 44.3°. This is warmer than most places in California.
In the 94121 zip code, there are 0.5 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in California.
In the 94121 zip code, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in California.
Humidity in the 94121 zip code is generally quite low and comfortable. There are few days during the summer when the humidity becomes unpleasant. The most humid months (but still comfortable) are August, September and July.
December is the wettest month in the 94121 zip code with 5.3 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 27.5 inches in the 94121 zip code means that it is wetter than most places in California.
January is the rainiest month in the 94121 zip code with 12.3 days of rain, and July is the driest month with only 1.0 rainy days. There are 77.9 rainy days annually in the 94121 zip code, which is rainier than most places in California. The rainiest season is Spring when it rains 47% of the time and the driest is Autumn with only a 6% chance of a rainy day.
There is rarely any recorded snowfall in the 94121 zip code, ranking it as one of the least snowy places in California. Any measurable snowfall is a rare occurance in the 94121 zip code.
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I've lived in the Lower Haight, the Mission, and the Outer Sunset, always avoiding the foggy Outer Richmond. I ended up here after a series of random events, and I have  More

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