| 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 | Wellsboro | Pennsylvania | National |
| Air quality index | 35 | 45 | 42 |
| Pollution index | 1,515,200 | 4,584,805 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 349 |
| Days with moderate air quality | 16 |
| 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. |
| Knoxville, PA | 773 | 35 | 30.0% |
| Arnot, PA | 512 | 35 | 30.0% |
| Tioga, PA | 702 | 35 | 30.0% |
| Mansfield, PA | 3,013 | 35 | 30.0% |
| Westfield, PA | 1,419 | 35 | 30.0% |
| Wellsboro, PA | 3,223 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Gray, GA | 3,223 | 38 | 24.0% |
| Georgetown, IL | 3,224 | 42 | 16.0% |
| Hodgenville, KY | 3,221 | 39 | 22.0% |
| Lebanon, VA | 3,221 | 45 | 10.0% |
| Portneuf, QC | 3,225 | n/a | |
| Wellsboro, PA | 3,223 | 35 | 30.0% |
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