| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 24°F | 42°F | 32°F | 3.4" |
| February | 25°F | 44°F | 33°F | 2.6" |
| March | 34°F | 56°F | 44°F | 3.9" |
| April | 43°F | 69°F | 56°F | 4.2" |
| May | 52°F | 76°F | 63°F | 4.1" |
| June | 60°F | 83°F | 71°F | 4.9" |
| July | 64°F | 85°F | 74°F | 4.8" |
| August | 63°F | 86°F | 73°F | 3.6" |
| September | 56°F | 80°F | 67°F | 3.2" |
| October | 45°F | 68°F | 55°F | 3.7" |
| November | 35°F | 57°F | 45°F | 2.9" |
| December | 29°F | 46°F | 37°F | 4.2" |
| Index | Belmont | West Virginia | National |
| Air quality index | 35 | 126 | 42 |
| Pollution index | 2,805,740 | 1,996,538 | 2,726,193 |
| Measurement | Total |
| Days measured | 364 |
| Days with good air quality | 333 |
| Days with moderate air quality | 31 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.005% |
| Lead | 0.060% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| North Hills, WV | 950 | 35 | 30.0% |
| Newport, OH | 1,310 | 35 | 30.0% |
| Parkersburg, WV | 29,732 | 35 | 30.0% |
| Marietta, OH | 13,551 | 35 | 30.0% |
| Friendly, WV | 124 | 35 | 30.0% |
| Belmont, WV | 965 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Windsor village, IL | 965 | 40 | 20.0% |
| Harmony, IN | 965 | 45 | 10.0% |
| Aulander, NC | 965 | 36 | 28.0% |
| Casper Mountain, WY | 965 | 42 | 16.0% |
| Mnjikaning First Nation 32, ON | 965 | n/a | |
| Belmont, WV | 965 | 35 | 30.0% |
Here are the best places to live in West Virginia
See the best places to live in Belmont
Safest States In The US
These are the largest cities in West Virginia