| 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 | Wheeling | West Virginia | National |
| Air quality index | 39 | 126 | 42 |
| Pollution index | 15,941,000 | 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 | 0.070% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.030% |
| Mercury | 1.030% |
| City | Population | Air Quality Index | National Avg. |
| Smithfield, OH | 827 | 39 | 22.0% |
| Bellaire, OH | 4,057 | 39 | 22.0% |
| Benwood, WV | 1,381 | 39 | 22.0% |
| Brookside, OH | 870 | 39 | 22.0% |
| St. Clairsville, OH | 5,080 | 39 | 22.0% |
| Wheeling, WV | 27,046 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| Wakefield, MA | 27,041 | 43 | 14.0% |
| Sainte-Thérèse, QC | 27,055 | n/a | |
| Magna, UT | 27,029 | 51 | 2.0% |
| Mason City, IA | 27,064 | 15 | 70.0% |
| Norco, CA | 27,021 | 89 | 78.0% |
| Wheeling, WV | 27,046 | 39 | 22.0% |
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