| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 32°F | 52°F | 41°F | 2.8" |
| February | 32°F | 54°F | 42°F | 2.6" |
| March | 40°F | 62°F | 50°F | 3.0" |
| April | 49°F | 73°F | 60°F | 3.5" |
| May | 58°F | 79°F | 68°F | 3.9" |
| June | 67°F | 87°F | 77°F | 4.5" |
| July | 71°F | 91°F | 80°F | 5.3" |
| August | 70°F | 88°F | 78°F | 5.4" |
| September | 64°F | 83°F | 73°F | 5.3" |
| October | 53°F | 74°F | 63°F | 6.0" |
| November | 41°F | 63°F | 52°F | 3.5" |
| December | 36°F | 56°F | 45°F | 3.6" |
| Index | Newport News | Virginia | National |
| Air quality index | 40 | 58 | 42 |
| Pollution index | 1,644,650 | 1,561,881 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 317 |
| Days with moderate air quality | 48 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.070% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.030% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Yorktown, VA | 286 | 40 | 20.0% |
| Rushmere, VA | 1,001 | 40 | 20.0% |
| Gloucester Point, VA | 10,373 | 40 | 20.0% |
| Benns Church, VA | 642 | 40 | 20.0% |
| Scotland, VA | 146 | 40 | 20.0% |
| Newport News, VA | 179,582 | 40 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| Providence, RI | 179,472 | 44 | 12.0% |
| Santa Rosa, CA | 178,391 | 34 | 32.0% |
| Sioux Falls, SD | 180,927 | 36 | 28.0% |
| Ontario, CA | 178,194 | 89 | 78.0% |
| Rancho Cucamonga, CA | 178,060 | 89 | 78.0% |
| Newport News, VA | 179,582 | 40 | 20.0% |
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