| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 20°F | 40°F | 30°F | 3.5" |
| February | 20°F | 42°F | 31°F | 3.1" |
| March | 28°F | 53°F | 40°F | 3.4" |
| April | 38°F | 67°F | 52°F | 3.9" |
| May | 48°F | 76°F | 62°F | 3.7" |
| June | 58°F | 84°F | 71°F | 5.5" |
| July | 63°F | 88°F | 75°F | 6.4" |
| August | 61°F | 85°F | 73°F | 5.0" |
| September | 54°F | 80°F | 66°F | 4.5" |
| October | 43°F | 68°F | 55°F | 5.4" |
| November | 33°F | 56°F | 44°F | 2.8" |
| December | 26°F | 45°F | 35°F | 4.9" |
| Index | Chapman | Pennsylvania | National |
| Air quality index | 42 | 45 | 42 |
| Pollution index | 3,167,110 | 4,584,805 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 275 |
| Days with moderate air quality | 86 |
| Days w/ poor A.Q. for sensitive groups | 4 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.030% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| East Bangor, PA | 1,098 | 34 | 32.0% |
| Saylorsburg, PA | 1,445 | 34 | 32.0% |
| Hutchinson, NJ | 122 | 34 | 32.0% |
| Delaware Water Gap, PA | 661 | 34 | 32.0% |
| Effort, PA | 2,356 | 34 | 32.0% |
| Chapman, PA | 149 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Calvert, AL | 149 | 42 | 16.0% |
| Rudy, AR | 149 | 36 | 28.0% |
| Blairsburg, IA | 149 | 37 | 26.0% |
| Calhoun, IL | 149 | 36 | 28.0% |
| Littleton, IL | 149 | 41 | 18.0% |
| Chapman, PA | 149 | 42 | 16.0% |
Here are the best places to live in Pennsylvania
See the best places to live in Chapman
Check out the 10 safest cities in Pennsylvania
Most Dangerous States In The US