San Jose-Sunnyvale-Santa Clara Metro Area, CA Climate

The climate in the San Jose-Sunnyvale-Santa Clara, CA Metro Area is usually mild, with warm summers and cool winters. Average temperatures range from highs of around 70 degrees Fahrenheit (21°C) in the summer to lows of 45 degrees Fahrenheit (7°C) in the winter. The area experiences nearly 300 days a year of sunshine, and average annual rainfall is about 20 inches (508 mm). Snowfall is rare, but not unheard of. Temperatures can occasionally dip below freezing at night or during winter storms.

San Jose-Sunnyvale-Santa Clara Metro Area, California gets 18 inches of rain, on average, per year. The US average is 38 inches of rain per year.

San Jose-Sunnyvale-Santa Clara Metro Area averages 0 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 257 sunny days per year in San Jose-Sunnyvale-Santa Clara Metro Area. The US average is 205 sunny days.

San Jose-Sunnyvale-Santa Clara Metro Area gets some kind of precipitation, on average, 62 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 82 degrees
Winter Low: the January low is 41
Rain: averages 18 inches of rain a year
Snow: averages 0 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the San Jose-Sunnyvale-Santa Clara metro area is 8.7 (10=best), which means it is more comfortable than most places in California.

9.7 Summer - 7.5 Winter

August, July and June are the most pleasant months in the San Jose-Sunnyvale-Santa Clara metro area, while January and December are the least comfortable months.

Climate	San Jose-Sunnyvale-Santa Clara, California	United States
	18.3 in.	38.1 in.
	0.1 in.	27.8 in.
	61.6 days	106.2 days
	257 days	205 days
	82.1°	85.8°
	40.8°	21.7°
	8.7	7
	5.2	4.3
	1573 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.

July is the hottest month for the San Jose-Sunnyvale-Santa Clara metro area with an average high temperature of 82.1°, which ranks it as cooler than most places in California. In the San Jose-Sunnyvale-Santa Clara 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 Jose-Sunnyvale-Santa Clara metro area are June, September and October.

In the San Jose-Sunnyvale-Santa Clara metro area, there are 19.7 days annually when the high temperature is over 90°, which is cooler than most places in California.

December has the coldest nighttime temperatures for the San Jose-Sunnyvale-Santa Clara metro area with an average of 40.7°. This is warmer than most places in California.

In the San Jose-Sunnyvale-Santa Clara metro area, there are 8.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In the San Jose-Sunnyvale-Santa Clara 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 Jose-Sunnyvale-Santa Clara 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 June.

February is the wettest month in the San Jose-Sunnyvale-Santa Clara metro area with 3.7 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 18.3 inches in the San Jose-Sunnyvale-Santa Clara metro area means that it is about average compared to other places in California.

February is the rainiest month in the San Jose-Sunnyvale-Santa Clara metro area with 10.2 days of rain, and July is the driest month with only 0.2 rainy days. There are 61.6 rainy days annually in the San Jose-Sunnyvale-Santa Clara metro area, which is rainier than most places in California. The rainiest season is Spring when it rains 50% of the time and the driest is Autumn with only a 2% chance of a rainy day.

An annual snowfall of 0.1 inches in the San Jose-Sunnyvale-Santa Clara metro area means that it is snowier than most places in California. December is the snowiest month in the San Jose-Sunnyvale-Santa Clara metro area with 0.0 inches of snow, and no months of the year have significant snowfall.

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