| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 25°F | 46°F | 34°F | 3.6" |
| February | 26°F | 48°F | 36°F | 3.1" |
| March | 35°F | 60°F | 46°F | 4.3" |
| April | 45°F | 72°F | 58°F | 4.6" |
| May | 52°F | 78°F | 65°F | 4.9" |
| June | 61°F | 86°F | 73°F | 4.6" |
| July | 65°F | 87°F | 75°F | 6.8" |
| August | 63°F | 87°F | 74°F | 3.6" |
| September | 57°F | 82°F | 68°F | 3.5" |
| October | 45°F | 70°F | 57°F | 3.7" |
| November | 35°F | 60°F | 46°F | 3.0" |
| December | 29°F | 49°F | 38°F | 4.4" |
| Index | Milton | West Virginia | National |
| Air quality index | 42 | 126 | 42 |
| Pollution index | 2,383,860 | 1,996,538 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 299 |
| Days with moderate air quality | 66 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.004% |
| Lead | 0.120% |
| Mercury | 0.020% |
| City | Population | Air Quality Index | National Avg. |
| Buffalo, WV | 1,061 | 40 | 20.0% |
| Teays Valley, WV | 13,729 | 40 | 20.0% |
| Eleanor, WV | 1,465 | 40 | 20.0% |
| Hurricane, WV | 6,225 | 40 | 20.0% |
| Winfield, WV | 3,133 | 40 | 20.0% |
| Milton, WV | 2,813 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| The Plains, OH | 2,813 | 25 | 50.0% |
| Oconto Falls, WI | 2,813 | 36 | 28.0% |
| Seward, AK | 2,812 | 31 | 38.0% |
| Flemingsburg, KY | 2,811 | 42 | 16.0% |
| Holly Hills, CO | 2,815 | 58 | 16.0% |
| Milton, WV | 2,813 | 42 | 16.0% |
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