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| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 24°F | 42°F | 32°F | 3.4" |
| February | 25°F | 44°F | 33°F | 2.6" |
| March | 34°F | 56°F | 44°F | 3.9" |
| April | 43°F | 69°F | 56°F | 4.2" |
| May | 52°F | 76°F | 63°F | 4.1" |
| June | 60°F | 83°F | 71°F | 4.9" |
| July | 64°F | 85°F | 74°F | 4.8" |
| August | 63°F | 86°F | 73°F | 3.6" |
| September | 56°F | 80°F | 67°F | 3.2" |
| October | 45°F | 68°F | 55°F | 3.7" |
| November | 35°F | 57°F | 45°F | 2.9" |
| December | 29°F | 46°F | 37°F | 4.2" |
| Index | Vienna | West Virginia | National |
| Air quality index | 35 | 126 | 42 |
| Pollution index | 2,805,740 | 1,996,538 | 2,726,193 |
| Measurement | Total |
| Days measured | 364 |
| Days with good air quality | 333 |
| Days with moderate air quality | 31 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.005% |
| Lead | 0.060% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Little Hocking, OH | 759 | 35 | 30.0% |
| Washington, WV | 1,303 | 35 | 30.0% |
| Parkersburg, WV | 29,732 | 35 | 30.0% |
| Boaz, WV | 1,645 | 35 | 30.0% |
| Belpre, OH | 6,387 | 35 | 30.0% |
| Vienna, WV | 10,261 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Milton, FL | 10,259 | 41 | 18.0% |
| Alfred and Plantagenet, ON | 10,255 | n/a | |
| Bound Brook, NJ | 10,254 | 41 | 18.0% |
| Smithville, MO | 10,269 | 47 | 6.0% |
| Mapleton, UT | 10,270 | 46 | 8.0% |
| Vienna, WV | 10,261 | 35 | 30.0% |