| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 42°F | 61°F | 50°F | 2.4" |
| February | 45°F | 63°F | 53°F | 2.4" |
| March | 47°F | 67°F | 56°F | 2.0" |
| April | 49°F | 70°F | 58°F | 1.3" |
| May | 53°F | 73°F | 61°F | 0.3" |
| June | 56°F | 77°F | 65°F | 0.2" |
| July | 59°F | 78°F | 67°F | 0.0" |
| August | 59°F | 78°F | 66°F | 0.0" |
| September | 57°F | 80°F | 67°F | 0.1" |
| October | 53°F | 75°F | 63°F | 0.7" |
| November | 47°F | 67°F | 56°F | 1.3" |
| December | 42°F | 60°F | 51°F | 2.6" |
| Index | Newark | California | National |
| Air quality index | 48 | 55 | 50 |
| Pollution index | 23,499,800 | 18,106,726 | 5,066,862 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 204 |
| Days with moderate air quality | 153 |
| Days w/ poor A.Q. for sensitive groups | 7 |
| Days with unhealthy air quality | 1 |
| Pollutant | Total |
| Arsenic | 0.120% |
| Benzene | 0.170% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.220% |
| Mercury | 0.140% |
| City, State | Population | Air Quality Index | National Avg. |
| San Lorenzo, CA | 24,790 | 43 | 14% |
| Castro Valley, CA | 62,825 | 43 | 14% |
| Ashland, CA | 24,288 | 43 | 14% |
| San Leandro, CA | 89,039 | 43 | 14% |
| Atherton, CA | 7,127 | 48 | 4% |
| Newark, CA | 44,677 | 48 | 4% |
| City, State | Population | Air Quality Index | National Avg. |
| Lake Ridge, VA | 44,685 | 49 | 2% |
| Everett, MA | 44,636 | 47 | 6% |
| Strongsville, OH | 44,622 | 55 | 10% |
| Titusville, FL | 44,746 | 35 | 30% |
| West Lafayette, IN | 44,543 | 52 | 4% |
| Newark, CA | 44,677 | 48 | 4% |