| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 23°F | 43°F | 32°F | 3.2" |
| February | 23°F | 44°F | 33°F | 2.5" |
| March | 32°F | 55°F | 43°F | 4.4" |
| April | 41°F | 68°F | 54°F | 4.0" |
| May | 49°F | 73°F | 61°F | 4.7" |
| June | 57°F | 80°F | 68°F | 4.8" |
| July | 61°F | 82°F | 71°F | 5.3" |
| August | 60°F | 81°F | 70°F | 3.9" |
| September | 54°F | 76°F | 64°F | 2.8" |
| October | 43°F | 66°F | 54°F | 3.5" |
| November | 33°F | 56°F | 44°F | 2.5" |
| December | 27°F | 46°F | 36°F | 4.0" |
| Index | Powellton | West Virginia | National |
| Air quality index | 295 | 126 | 42 |
| Pollution index | 953,270 | 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 | 0.002% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.003% |
| City | Population | Air Quality Index | National Avg. |
| Rand, WV | 977 | 40 | 20.0% |
| Chelyan, WV | 920 | 40 | 20.0% |
| Gauley Bridge, WV | 646 | 40 | 20.0% |
| Kimberly, WV | 273 | 40 | 20.0% |
| Pratt, WV | 334 | 40 | 20.0% |
| Powellton, WV | 621 | 295 | 490.0% |
| City | Population | Air Quality Index | National Avg. |
| Brevig Mission, AK | 621 | 38 | 24.0% |
| Lockesburg, AR | 621 | 39 | 22.0% |
| Page Park, FL | 621 | 36 | 28.0% |
| Waikane, HI | 621 | 30 | 40.0% |
| Fallon Station, NV | 621 | 41 | 18.0% |
| Powellton, WV | 621 | 295 | 490.0% |
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