| 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 | 42 |
| Pollution index | 19,202,400 | 10,473,190 | 2,726,193 |
| 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 | Population | Air Quality Index | National Avg. |
| Alto, CA | 818 | 40 | 20.0% |
| Larkspur, CA | 12,363 | 40 | 20.0% |
| Strawberry, CA | 5,325 | 40 | 20.0% |
| Benicia, CA | 28,158 | 40 | 20.0% |
| Port Costa, CA | 242 | 40 | 20.0% |
| Berkeley, CA | 123,065 | 40 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| Victorville, CA | 122,958 | 89 | 78.0% |
| Columbia, MO | 122,659 | 38 | 24.0% |
| Odessa, TX | 122,630 | 28 | 44.0% |
| Fargo, ND | 123,550 | 33 | 34.0% |
| Hartford, CT | 122,549 | 41 | 18.0% |
| Berkeley, CA | 123,065 | 40 | 20.0% |
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