| 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 | Mathews | Virginia | National |
| Air quality index | 40 | 58 | 42 |
| Pollution index | 244,779 | 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 | 0.000% |
| Benzene | 0.003% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Gloucester Point, VA | 10,373 | 40 | 20.0% |
| Gwynn, VA | 634 | 40 | 20.0% |
| Deltaville, VA | 943 | 40 | 20.0% |
| Yorktown, VA | 286 | 40 | 20.0% |
| Gloucester Courthouse, VA | 2,969 | 40 | 20.0% |
| Mathews, VA | 683 | 40 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| North City, IL | 683 | 43 | 14.0% |
| Holton, IN | 683 | 35 | 30.0% |
| Wilson, KS | 683 | 40 | 20.0% |
| Smiths Grove, KY | 683 | 43 | 14.0% |
| Cheshire, MA | 683 | 37 | 26.0% |
| Mathews, VA | 683 | 40 | 20.0% |
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