San Francisco-Oakland-Berkeley Metro Area, CA Climate

The climate in the San Francisco-Oakland-Hayward, CA Metro Area is generally mild and temperate. Winters are typically cool and wet, with occasional periods of warmer weather. Summers tend to be warm and dry, although fog often rolls in during the late afternoon or early evening hours. Average temperatures range from lows of 48 degrees Fahrenheit in the winter months to highs of 79 degrees Fahrenheit in the summer months. Annual precipitation totals average around 22 inches, with most rain falling between November and April. Despite its proximity to the ocean, San Francisco-Oakland-Hayward does not get much snowfall; however, nearby areas may experience snow at higher elevations.

San Francisco-Oakland-Berkeley Metro Area, California gets 25 inches of rain, on average, per year. The US average is 38 inches of rain per year.

San Francisco-Oakland-Berkeley Metro Area averages 0 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 262 sunny days per year in San Francisco-Oakland-Berkeley Metro Area. The US average is 205 sunny days.

San Francisco-Oakland-Berkeley Metro Area gets some kind of precipitation, on average, 68 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 77 degrees
Winter Low: the January low is 42
Rain: averages 25 inches of rain a year
Snow: averages 0 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the San Francisco-Oakland-Hayward metro area is 8.5 (10=best), which means it is more comfortable than most places in California.

9.4 Summer - 7.4 Winter

September, August and July are the most pleasant months in the San Francisco-Oakland-Hayward metro area, while January and December are the least comfortable months.

Climate	San Francisco-Oakland-Berkeley, California	United States
	25.2 in.	38.1 in.
	0.0 in.	27.8 in.
	68.4 days	106.2 days
	262 days	205 days
	76.5°	85.8°
	42.2°	21.7°
	8.5	7
	5.3	4.3
	512 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.

August is the hottest month for the San Francisco-Oakland-Hayward metro area with an average high temperature of 77.1°, which ranks it as cooler than most places in California. In the San Francisco-Oakland-Hayward metro area, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for the San Francisco-Oakland-Hayward metro area are August, September and July.

In the San Francisco-Oakland-Hayward metro area, there are 15.9 days annually when the high temperature is over 90°, which is cooler than most places in California.

January has the coldest nighttime temperatures for the San Francisco-Oakland-Hayward metro area with an average of 42.2°. This is warmer than most places in California.

In the San Francisco-Oakland-Hayward metro area, there are 4.8 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In the San Francisco-Oakland-Hayward metro area, 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 San Francisco-Oakland-Hayward metro area 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, July and September.

December is the wettest month in the San Francisco-Oakland-Hayward metro area 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 25.2 inches in the San Francisco-Oakland-Hayward metro area means that it is wetter than most places in California.

January is the rainiest month in the San Francisco-Oakland-Hayward metro area with 11.3 days of rain, and July is the driest month with only 0.4 rainy days. There are 68.4 rainy days annually in the San Francisco-Oakland-Hayward metro area, which is rainier than most places in California. The rainiest season is Spring when it rains 49% of the time and the driest is Autumn with only a 3% chance of a rainy day.

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

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