| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 22°F | 38°F | 30°F | 2.9" |
| February | 23°F | 40°F | 30°F | 2.0" |
| March | 32°F | 52°F | 41°F | 3.5" |
| April | 42°F | 65°F | 53°F | 3.3" |
| May | 51°F | 73°F | 62°F | 4.2" |
| June | 59°F | 80°F | 69°F | 4.5" |
| July | 63°F | 84°F | 73°F | 3.6" |
| August | 62°F | 83°F | 72°F | 3.9" |
| September | 55°F | 77°F | 65°F | 3.3" |
| October | 45°F | 65°F | 54°F | 3.6" |
| November | 35°F | 54°F | 44°F | 2.6" |
| December | 27°F | 43°F | 34°F | 3.6" |
| Index | West Liberty | West Virginia | National |
| Air quality index | 39 | 126 | 42 |
| Pollution index | 1,410,280 | 1,996,538 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 318 |
| Days with moderate air quality | 47 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.001% |
| Mercury | 0.004% |
| City | Population | Air Quality Index | National Avg. |
| Shadyside, OH | 3,788 | 39 | 22.0% |
| Triadelphia, WV | 794 | 39 | 22.0% |
| Lansing, OH | 496 | 39 | 22.0% |
| Yorkville, OH | 1,013 | 39 | 22.0% |
| Bridgeport, OH | 1,652 | 39 | 22.0% |
| West Liberty, WV | 1,650 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| Monon, IN | 1,650 | 42 | 16.0% |
| Laguna Park, TX | 1,650 | 38 | 24.0% |
| Pittsford, NY | 1,651 | 37 | 26.0% |
| Honeyville, UT | 1,651 | 44 | 12.0% |
| Home, WA | 1,649 | 21 | 58.0% |
| West Liberty, WV | 1,650 | 39 | 22.0% |
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