| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 21°F | 36°F | 28°F | 4.1" |
| February | 20°F | 37°F | 28°F | 3.0" |
| March | 30°F | 49°F | 39°F | 5.9" |
| April | 40°F | 63°F | 51°F | 4.9" |
| May | 50°F | 72°F | 60°F | 4.9" |
| June | 58°F | 79°F | 68°F | 7.2" |
| July | 62°F | 82°F | 71°F | 7.6" |
| August | 60°F | 80°F | 69°F | 6.5" |
| September | 54°F | 74°F | 63°F | 5.4" |
| October | 44°F | 63°F | 52°F | 4.7" |
| November | 34°F | 51°F | 42°F | 3.8" |
| December | 27°F | 41°F | 33°F | 4.0" |
| Index | West Leechburg | Pennsylvania | National |
| Air quality index | 56 | 45 | 42 |
| Pollution index | 7,262,690 | 4,584,805 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 129 |
| Days with moderate air quality | 220 |
| Days w/ poor A.Q. for sensitive groups | 12 |
| Days with unhealthy air quality | 4 |
| Pollutant | Total |
| Arsenic | 0.030% |
| Benzene | 0.090% |
| Carbon Tetrachloride | 0.260% |
| Lead | 0.140% |
| Mercury | 0.030% |
| City | Population | Air Quality Index | National Avg. |
| Meadowood, PA | 2,909 | 31 | 38.0% |
| Saltsburg, PA | 689 | 38 | 24.0% |
| East Vandergrift, PA | 697 | 38 | 24.0% |
| Leechburg, PA | 2,154 | 38 | 24.0% |
| Apollo, PA | 1,408 | 38 | 24.0% |
| West Leechburg, PA | 1,389 | 56 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Grandview, IL | 1,389 | 40 | 20.0% |
| New Middletown, OH | 1,389 | 42 | 16.0% |
| Gardendale, TX | 1,389 | 28 | 44.0% |
| Parks, AZ | 1,388 | 45 | 10.0% |
| Lone Tree, IA | 1,390 | 35 | 30.0% |
| West Leechburg, PA | 1,389 | 56 | 12.0% |
Here are the best places to live in Pennsylvania
These are the largest cities in Pennsylvania
See the best places to live in West Leechburg
Check out the 10 most dangerous cities in Pennsylvania