| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 31°F | 50°F | 40°F | 5.0" |
| February | 31°F | 53°F | 41°F | 4.2" |
| March | 39°F | 62°F | 50°F | 4.8" |
| April | 48°F | 73°F | 60°F | 7.0" |
| May | 57°F | 79°F | 68°F | 6.3" |
| June | 66°F | 87°F | 76°F | 9.1" |
| July | 71°F | 90°F | 80°F | 7.8" |
| August | 69°F | 88°F | 78°F | 6.0" |
| September | 63°F | 82°F | 72°F | 8.9" |
| October | 51°F | 73°F | 61°F | 8.0" |
| November | 39°F | 62°F | 50°F | 4.0" |
| December | 34°F | 55°F | 44°F | 5.0" |
| Index | Tappahannock | Virginia | National |
| Air quality index | 44 | 58 | 42 |
| Pollution index | 6,505,420 | 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 | 0.150% |
| Benzene | 0.060% |
| Carbon Tetrachloride | 0.020% |
| Lead | 0.050% |
| Mercury | 0.004% |
| City | Population | Air Quality Index | National Avg. |
| Montross, VA | 553 | 41 | 18.0% |
| Warsaw, VA | 2,368 | 44 | 12.0% |
| Central Garage, VA | 1,211 | 44 | 12.0% |
| Tappahannock, VA | 1,911 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Newport, ME | 1,911 | 31 | 38.0% |
| Cold Spring, NY | 1,911 | 36 | 28.0% |
| Lattingtown, NY | 1,911 | 51 | 2.0% |
| Lot 19, PE | 1,911 | n/a | |
| Olla, LA | 1,912 | 30 | 40.0% |
| Tappahannock, VA | 1,911 | 44 | 12.0% |
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