| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 24°F | 38°F | 31°F | 4.7" |
| February | 23°F | 39°F | 31°F | 4.1" |
| March | 33°F | 51°F | 42°F | 6.1" |
| April | 42°F | 63°F | 54°F | 4.9" |
| May | 52°F | 72°F | 63°F | 6.5" |
| June | 60°F | 78°F | 70°F | 7.0" |
| July | 64°F | 82°F | 74°F | 9.5" |
| August | 62°F | 80°F | 72°F | 7.4" |
| September | 56°F | 74°F | 66°F | 6.3" |
| October | 45°F | 63°F | 55°F | 5.9" |
| November | 35°F | 52°F | 44°F | 5.6" |
| December | 29°F | 43°F | 36°F | 6.4" |
| Index | Homer City | Pennsylvania | National |
| Air quality index | 38 | 45 | 42 |
| Pollution index | 2,970,510 | 4,584,805 | 2,726,193 |
| Measurement | Total |
| Days measured | 364 |
| Days with good air quality | 337 |
| Days with moderate air quality | 27 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.050% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.650% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Indiana, PA | 13,162 | 38 | 24.0% |
| Creekside, PA | 319 | 38 | 24.0% |
| Jacksonville CDP (Centre County), PA | 98 | 38 | 24.0% |
| Chevy Chase Heights, PA | 1,463 | 38 | 24.0% |
| Shelocta, PA | 74 | 38 | 24.0% |
| Homer City, PA | 1,582 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Metlakatla, AK | 1,582 | 20 | 60.0% |
| Grayson, CA | 1,582 | 49 | 2.0% |
| Springfield, NE | 1,582 | 40 | 20.0% |
| McCord, OK | 1,582 | 40 | 20.0% |
| Southampton, NB | 1,582 | n/a | |
| Homer City, PA | 1,582 | 38 | 24.0% |
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