| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 23°F | 41°F | 31°F | 3.4" |
| February | 24°F | 44°F | 33°F | 5.0" |
| March | 32°F | 55°F | 43°F | 4.1" |
| April | 41°F | 67°F | 53°F | 5.5" |
| May | 49°F | 73°F | 61°F | 6.4" |
| June | 57°F | 80°F | 68°F | 6.5" |
| July | 61°F | 82°F | 71°F | 5.2" |
| August | 60°F | 82°F | 70°F | 4.8" |
| September | 54°F | 76°F | 64°F | 5.1" |
| October | 42°F | 66°F | 53°F | 7.3" |
| November | 32°F | 55°F | 42°F | 3.9" |
| December | 28°F | 46°F | 36°F | 4.8" |
| Index | Cowen | West Virginia | National |
| Air quality index | 295 | 126 | 42 |
| Pollution index | 11,851,300 | 1,996,538 | 2,726,193 |
| Measurement | Total |
| Days measured | 120 |
| Days with good air quality | 106 |
| Days with moderate air quality | 14 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.090% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.020% |
| Mercury | 0.720% |
| City | Population | Air Quality Index | National Avg. |
| Parcoal, WV | 81 | 31 | 38.0% |
| Addison (Webster Springs), WV | 1,284 | 31 | 38.0% |
| Bergoo, WV | 70 | 31 | 38.0% |
| Birch River, WV | 116 | 40 | 20.0% |
| Tioga, WV | 220 | 295 | 490.0% |
| Cowen, WV | 664 | 295 | 490.0% |
| City | Population | Air Quality Index | National Avg. |
| Ireton, IA | 664 | 35 | 30.0% |
| Woodland Hills, KY | 664 | 49 | 2.0% |
| Metamora, MI | 664 | 38 | 24.0% |
| North Rose, NY | 664 | 37 | 26.0% |
| Kirtland Hills, OH | 664 | 50 | = 100 |
| Cowen, WV | 664 | 295 | 490.0% |
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