| 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 | Daniels | West Virginia | National |
| Air quality index | 295 | 126 | 42 |
| Pollution index | 1,956,300 | 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 | 0.003% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.004% |
| Lead | 0.002% |
| Mercury | 0.005% |
| City | Population | Air Quality Index | National Avg. |
| Corinne, WV | 99 | 295 | 490.0% |
| Mullens, WV | 1,797 | 295 | 490.0% |
| Crab Orchard, WV | 2,483 | 295 | 490.0% |
| Mabscott, WV | 1,441 | 295 | 490.0% |
| Prosperity, WV | 1,451 | 295 | 490.0% |
| Daniels, WV | 1,800 | 295 | 490.0% |
| City | Population | Air Quality Index | National Avg. |
| Olathe, CO | 1,800 | 44 | 12.0% |
| Flatonia, TX | 1,800 | 44 | 12.0% |
| Cana, VA | 1,800 | 45 | 10.0% |
| Bon Accord, AB | 1,800 | n/a | |
| Priest River, ID | 1,799 | 43 | 14.0% |
| Daniels, WV | 1,800 | 295 | 490.0% |
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