| 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 | Bethlehem | West Virginia | National |
| Air quality index | 39 | 126 | 42 |
| Pollution index | 15,941,000 | 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 | 0.070% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.030% |
| Mercury | 1.030% |
| City | Population | Air Quality Index | National Avg. |
| Neffs, OH | 1,008 | 39 | 22.0% |
| Triadelphia, WV | 794 | 39 | 22.0% |
| Cameron, WV | 363 | 39 | 22.0% |
| Mount Pleasant, OH | 395 | 39 | 22.0% |
| Clearview, WV | 603 | 39 | 22.0% |
| Bethlehem, WV | 2,468 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| Lawson Heights, PA | 2,468 | 39 | 22.0% |
| Holiday Island, AR | 2,467 | 18 | 64.0% |
| Charlevoix, MI | 2,467 | 36 | 28.0% |
| Doniphan, MO | 2,467 | 26 | 48.0% |
| Albany, KY | 2,469 | 40 | 20.0% |
| Bethlehem, WV | 2,468 | 39 | 22.0% |
Here are the best places to live in West Virginia
Check out the 10 most dangerous cities in West Virginia
See the best places to live in Bethlehem
Most Dangerous States In The US