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| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 16°F | 35°F | 26°F | 1.7" |
| February | 16°F | 37°F | 26°F | 1.5" |
| March | 24°F | 47°F | 35°F | 2.3" |
| April | 34°F | 61°F | 47°F | 2.9" |
| May | 44°F | 72°F | 58°F | 2.9" |
| June | 54°F | 80°F | 67°F | 4.0" |
| July | 58°F | 84°F | 71°F | 3.2" |
| August | 56°F | 82°F | 68°F | 4.3" |
| September | 49°F | 75°F | 62°F | 3.3" |
| October | 40°F | 63°F | 51°F | 3.9" |
| November | 29°F | 51°F | 40°F | 2.0" |
| December | 23°F | 40°F | 31°F | 2.2" |
| Index | Sylvania | Pennsylvania | National |
| Air quality index | 36 | 45 | 42 |
| Pollution index | 1,515,200 | 4,584,805 | 2,726,193 |
| Measurement | Total |
| Days measured | 352 |
| Days with good air quality | 314 |
| Days with moderate air quality | 38 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.050% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.020% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Lawrenceville, PA | 624 | 35 | 30.0% |
| Blossburg, PA | 2,083 | 35 | 30.0% |
| Millerton, PA | 406 | 35 | 30.0% |
| Arnot, PA | 512 | 35 | 30.0% |
| Mansfield, PA | 3,013 | 35 | 30.0% |
| Sylvania, PA | 194 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Laurel, IA | 194 | 37 | 26.0% |
| Gilson, IL | 194 | 41 | 18.0% |
| Bison, KS | 194 | 15 | 70.0% |
| Maple Grove, MI | 194 | 36 | 28.0% |
| Bolckow, MO | 194 | 43 | 14.0% |
| Sylvania, PA | 194 | 36 | 28.0% |
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