| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 34°F | 48°F | 41°F | 5.3" |
| February | 33°F | 45°F | 39°F | 2.4" |
| March | 40°F | 57°F | 49°F | 4.6" |
| April | 50°F | 67°F | 59°F | 11.1" |
| May | 56°F | 73°F | 64°F | 5.5" |
| June | 68°F | 85°F | 76°F | 7.6" |
| July | 72°F | 89°F | 80°F | 6.0" |
| August | 73°F | 88°F | 80°F | 8.7" |
| September | 67°F | 83°F | 75°F | 2.1" |
| October | 58°F | 74°F | 66°F | 17.8" |
| November | 46°F | 62°F | 53°F | 6.0" |
| December | 36°F | 51°F | 43°F | 6.1" |
| Index | Williamsburg | Virginia | National |
| Air quality index | 44 | 58 | 42 |
| Pollution index | 203,556 | 1,561,881 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 272 |
| Days with moderate air quality | 93 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.003% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.001% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Gloucester Courthouse, VA | 2,969 | 40 | 20.0% |
| Rushmere, VA | 1,001 | 40 | 20.0% |
| Gloucester Point, VA | 10,373 | 40 | 20.0% |
| Scotland, VA | 146 | 40 | 20.0% |
| Newport News, VA | 179,582 | 40 | 20.0% |
| Williamsburg, VA | 15,034 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Stone Ridge, VA | 15,034 | 47 | 6.0% |
| Belvedere Park, GA | 15,028 | 52 | 4.0% |
| Newport, KY | 15,045 | 54 | 8.0% |
| Vandalia, OH | 15,021 | 47 | 6.0% |
| Hayden, ID | 15,049 | 43 | 14.0% |
| Williamsburg, VA | 15,034 | 44 | 12.0% |
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