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 | Hi-30 | San Bernardino | California |
Air quality index | 89 | 89 | 55 |
Pollution index | 31,575,300 | 31,575,300 | 10,473,190 |
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 | Population | Air Quality Index | National Avg. |
Colton, CA | 54,215 | 89 | 78.0% |
Loma Linda, CA | 24,239 | 89 | 78.0% |
Yucaipa, CA | 54,358 | 89 | 78.0% |
Lytle Creek, CA | 656 | 89 | 78.0% |
Lake Arrowhead, CA | 9,741 | 89 | 78.0% |
San Bernardino, CA | 216,784 | 89 | 78.0% |
City | Population | Air Quality Index | National Avg. |
Tacoma, WA | 215,766 | 18 | 64.0% |
Des Moines, IA | 215,408 | 39 | 22.0% |
Richmond Hill, ON | 215,407 | n/a | |
Spring Valley, NV | 218,697 | 54 | 8.0% |
Enterprise, NV | 214,591 | 54 | 8.0% |
San Bernardino, CA | 216,784 | 89 | 78.0% |