| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 41°F | 59°F | 50°F | 2.8" |
| February | 45°F | 62°F | 53°F | 3.1" |
| March | 47°F | 65°F | 55°F | 2.9" |
| April | 49°F | 67°F | 57°F | 1.8" |
| May | 52°F | 69°F | 59°F | 0.4" |
| June | 54°F | 72°F | 62°F | 0.3" |
| July | 56°F | 73°F | 63°F | 0.0" |
| August | 57°F | 73°F | 63°F | 0.0" |
| September | 55°F | 76°F | 64°F | 0.1" |
| October | 52°F | 73°F | 61°F | 1.0" |
| November | 47°F | 65°F | 56°F | 1.9" |
| December | 42°F | 59°F | 50°F | 4.1" |
| Index | Berkeley | California | National |
| Air quality index | 40 | 55 | 50 |
| Pollution index | 19,202,400 | 18,106,726 | 5,066,862 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 290 |
| Days with moderate air quality | 74 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.180% |
| Benzene | 0.140% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.280% |
| Mercury | 0.060% |
| City, State | Population | Air Quality Index | National Avg. |
| Alhambra Valley, CA | 501 | 40 | 20% |
| Martinez, CA | 37,544 | 40 | 20% |
| Reliez Valley, CA | 3,595 | 40 | 20% |
| Shell Ridge, CA | 1,123 | 40 | 20% |
| San Leandro, CA | 89,039 | 40 | 20% |
| Berkeley, CA | 118,585 | 40 | 20% |
| City, State | Population | Air Quality Index | National Avg. |
| Norman, OK | 118,974 | 48 | 4% |
| Ann Arbor, MI | 118,087 | 40 | 20% |
| Beaumont, TX | 117,729 | 45 | 10% |
| Allentown, PA | 119,624 | 42 | 16% |
| Vallejo, CA | 119,644 | 40 | 20% |
| Berkeley, CA | 118,585 | 40 | 20% |
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