Riverside-San Bernardino-Ontario Metro Area, CA Climate

The Riverside-San Bernardino-Ontario, CA Metro Area has a mild climate year-round. In general, the summers are warm and dry with temperatures rarely rising above 95 degrees Fahrenheit and winters are mild with temperatures rarely dropping below 40 degrees Fahrenheit. The area generally experiences low to moderate levels of rainfall throughout the year, ranging from about 6 inches in July up to 8 inches in February. Snowfall is rare but does occur occasionally in the higher elevations of the nearby mountains. This makes Riverside-San Bernardino-Ontario, CA Metro Area ideal for outdoor activities such as hiking or biking all year round.

Riverside-San Bernardino-Ontario Metro Area, California gets 13 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Riverside-San Bernardino-Ontario Metro Area averages 6 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 268 sunny days per year in Riverside-San Bernardino-Ontario Metro Area. The US average is 205 sunny days.

Riverside-San Bernardino-Ontario Metro Area gets some kind of precipitation, on average, 32 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 96 degrees
Winter Low: the January low is 38
Rain: averages 13 inches of rain a year
Snow: averages 6 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the Riverside-San Bernardino-Ontario metro area is 8.1 (10=best), which means it is about average compared to other places in California.

7.2 Summer - 8.1 Winter

October, May and April are the most pleasant months in the Riverside-San Bernardino-Ontario metro area, while July and August are the least comfortable months.

Climate	Riverside-San Bernardino-Ontario, California	United States
	13.4 in.	38.1 in.
	5.5 in.	27.8 in.
	31.5 days	106.2 days
	268 days	205 days
	96.4°	85.8°
	38.0°	21.7°
	8.1	7
	5.7	4.3
	2260 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 Riverside-San Bernardino-Ontario metro area with an average high temperature of 96.5°, which ranks it as warmer than most places in California. In the Riverside-San Bernardino-Ontario metro area, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for the Riverside-San Bernardino-Ontario metro area are April, October and May.

In the Riverside-San Bernardino-Ontario metro area, there are 102.9 days annually when the high temperature is over 90°, which is hotter than most places in California.

December has the coldest nighttime temperatures for the Riverside-San Bernardino-Ontario metro area with an average of 37.1°. This is about average compared to other places in California.

In the Riverside-San Bernardino-Ontario metro area, there are 29.4 days annually when the nighttime low temperature falls below freezing, which is colder than most places in California.

In the Riverside-San Bernardino-Ontario 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 Riverside-San Bernardino-Ontario 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 July, August and September.

February is the wettest month in the Riverside-San Bernardino-Ontario metro area with 3.0 inches of rain, and the driest month is June with 0.1 inches. The wettest season is Spring with 57% of yearly precipitation and 4% occurs in Autumn, which is the driest season. The annual rainfall of 13.4 inches in the Riverside-San Bernardino-Ontario metro area means that it is drier than most places in California.

February is the rainiest month in the Riverside-San Bernardino-Ontario metro area with 5.4 days of rain, and June is the driest month with only 0.5 rainy days. There are 31.5 rainy days annually in the Riverside-San Bernardino-Ontario metro area, which is one of the least rainy places in California. The rainiest season is Spring when it rains 46% of the time and the driest is Autumn with only a 8% chance of a rainy day.

An annual snowfall of 5.5 inches in the Riverside-San Bernardino-Ontario metro area means that it is snowier than most places in California. February is the snowiest month in the Riverside-San Bernardino-Ontario metro area with 1.6 inches of snow, and 4 months of the year have significant snowfall.

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