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" |
Index | Ne-Sterling | San Bernardino | California |
Air quality index | 89 | 89 | 55 |
Pollution index | 31,575,300 | 31,575,300 | 18,106,726 |
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 |
Pollutant | Total |
Arsenic | 0.110% |
Benzene | 0.260% |
Carbon Tetrachloride | 0.020% |
Lead | 0.350% |
Mercury | 0.280% |
City, State | Population | Air Quality Index | National Avg. |
Calimesa, CA | 8,379 | 89 | 78% |
Jurupa Valley, CA | 100,737 | 89 | 78% |
Redlands, CA | 70,442 | 89 | 78% |
Fontana, CA | 205,228 | 89 | 78% |
Rialto, CA | 102,418 | 89 | 78% |
San Bernardino, CA | 214,581 | 89 | 78% |
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% |