California, San Bernardino, CA Weather - Forecast & Monthly Averages

Buy Rent

Current weather conditions temporarily unavailable!

Key findings

The highest monthly average temperature in California for August is 78 degrees
The lowest monthly average temperature in California for December is 55 degrees
The most monthly precipitation in California occurs in December with 1.9 inches
The air quality index in California is 79% worse than the national average
The pollution index in California is 523% worse than the national average

For Sale For Rent

Find real estate listings

Find rental listings

Compare San Bernardino, CA Weather

See all California poll results

California Average Temperature

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
Month	Temp. _(min)	Temp. _(max)	Temp. _(avg)	Precipitation
January	44°F	70°F	56°F	1.6"
February	45°F	72°F	57°F	1.2"
March	47°F	75°F	60°F	0.7"
April	50°F	78°F	63°F	0.5"
May	55°F	82°F	66°F	0.2"
June	59°F	89°F	72°F	0.0"
July	65°F	94°F	77°F	0.2"
August	65°F	95°F	78°F	0.1"
September	63°F	94°F	76°F	0.2"
October	56°F	85°F	69°F	0.2"
November	49°F	77°F	62°F	0.5"
December	44°F	69°F	55°F	1.9"

The best places in California

Here are the best places to live in California

These are the 10 most affordable cities in California

10 Best cities in California for employment

Check out the 10 safest cities in California

California air quality index & pollution index

In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
Index	California	San Bernardino	California
Air quality index	89	89	55
Pollution index	31,575,300	31,575,300	18,106,726

California air quality information

Measurement	Total
Days measured	365
Days with good air quality	42
Days with moderate air quality	178
Days w/ poor A.Q. for sensitive groups	79
Days with unhealthy air quality	58

California air quality information

Pollutant	Total
Arsenic	0.110%
Benzene	0.260%
Carbon Tetrachloride	0.020%
Lead	0.350%
Mercury	0.280%

Average monthly California temperature with heat index

California monthly precipitation with daily maximum

California monthly snow depth with daily maximum

California monthly wind speed information

Nearby cities with good air quality

City, State	Population	Air Quality Index	National Avg.
Colton, CA	53,856	89	78%
Loma Linda, CA	23,859	89	78%
Riverside, CA	318,678	89	78%
Crestline, CA	8,900	89	78%
Muscoy, CA	13,025	89	78%
San Bernardino, CA	214,581	89	78%

Cities with similar population

City, State	Population	Air Quality Index	National Avg.
Des Moines, IA	212,859	39	22%
Birmingham, AL	212,424	53	6%
Richmond, VA	216,773	44	12%
Spokane, WA	212,078	43	14%
Boise, ID	218,677	36	28%
San Bernardino, CA	214,581	89	78%

Source: The California, San Bernardino, CA weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.