| 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 | Bethany | West Virginia | National |
| Air quality index | 39 | 126 | 42 |
| Pollution index | 1,410,280 | 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 | 0.002% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.001% |
| Mercury | 0.004% |
| City | Population | Air Quality Index | National Avg. |
| Neffs, OH | 1,008 | 39 | 22.0% |
| Martins Ferry, OH | 6,589 | 39 | 22.0% |
| Clearview, WV | 603 | 39 | 22.0% |
| Bridgeport, OH | 1,652 | 39 | 22.0% |
| Green Hills, PA | 14 | 39 | 22.0% |
| Bethany, WV | 1,034 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| Snead, AL | 1,034 | 43 | 14.0% |
| Center Hill, FL | 1,034 | 30 | 40.0% |
| Willards, MD | 1,034 | 36 | 28.0% |
| Kittery Point, ME | 1,034 | 37 | 26.0% |
| Maypearl, TX | 1,034 | 41 | 18.0% |
| Bethany, WV | 1,034 | 39 | 22.0% |
Here are the best places to live in West Virginia
See the best places to live in Bethany
These are the largest cities in West Virginia
Most Dangerous States In The US