| 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 | Alameda | California | National |
| Air quality index | 43 | 55 | 50 |
| Pollution index | 19,202,400 | 18,106,726 | 5,066,862 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 241 |
| Days with moderate air quality | 115 |
| Days w/ poor A.Q. for sensitive groups | 9 |
| Days with unhealthy air quality |
| 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. |
| Alto, CA | 649 | 43 | 14% |
| Brisbane, CA | 4,568 | 43 | 14% |
| Castro Valley, CA | 62,825 | 43 | 14% |
| Corte Madera, CA | 9,694 | 43 | 14% |
| El Cerrito CDP, CA | 5,699 | 43 | 14% |
| Alameda, CA | 77,409 | 43 | 14% |
| City, State | Population | Air Quality Index | National Avg. |
| Chino Hills, CA | 77,266 | 85 | 70% |
| Bellflower, CA | 77,687 | 74 | 48% |
| Pleasanton, CA | 77,046 | 48 | 4% |
| Gary, IN | 77,858 | 60 | 20% |
| Mount Pleasant, SC | 77,907 | 36 | 28% |
| Alameda, CA | 77,409 | 43 | 14% |
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