| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 30°F | 51°F | 40°F | 3.2" |
| February | 30°F | 54°F | 41°F | 2.6" |
| March | 38°F | 63°F | 49°F | 3.7" |
| April | 47°F | 73°F | 60°F | 4.2" |
| May | 56°F | 80°F | 67°F | 4.1" |
| June | 65°F | 87°F | 75°F | 5.5" |
| July | 69°F | 90°F | 79°F | 5.2" |
| August | 68°F | 88°F | 77°F | 4.9" |
| September | 61°F | 82°F | 71°F | 5.5" |
| October | 50°F | 73°F | 60°F | 4.3" |
| November | 38°F | 62°F | 49°F | 3.2" |
| December | 34°F | 56°F | 44°F | 3.8" |
| Index | Sussex | Virginia | National |
| Air quality index | 44 | 58 | 42 |
| Pollution index | 184,722 | 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 | 0.010% |
| Benzene | 0.002% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Courtland, VA | 1,679 | 40 | 20.0% |
| Waverly, VA | 2,641 | 44 | 12.0% |
| Camptown, VA | 761 | 44 | 12.0% |
| Capron, VA | 123 | 44 | 12.0% |
| Jarratt, VA | 866 | 44 | 12.0% |
| Sussex, VA | 355 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Rockford Bay, ID | 355 | 43 | 14.0% |
| Latham, IL | 355 | 44 | 12.0% |
| Ransom, IL | 355 | 0 | 100.0% |
| Gridley, KS | 355 | 22 | 56.0% |
| Spottsville, KY | 355 | 45 | 10.0% |
| Sussex, VA | 355 | 44 | 12.0% |
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