| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 17°F | 33°F | 25°F | 2.8" |
| February | 17°F | 34°F | 25°F | 2.3" |
| March | 25°F | 44°F | 34°F | 3.4" |
| April | 37°F | 58°F | 46°F | 4.4" |
| May | 46°F | 68°F | 57°F | 4.4" |
| June | 54°F | 75°F | 65°F | 5.9" |
| July | 59°F | 80°F | 69°F | 4.9" |
| August | 57°F | 77°F | 66°F | 5.7" |
| September | 51°F | 71°F | 61°F | 5.0" |
| October | 41°F | 60°F | 50°F | 5.8" |
| November | 31°F | 48°F | 39°F | 3.0" |
| December | 23°F | 38°F | 30°F | 4.4" |
| Index | Mountainhome | Pennsylvania | National |
| Air quality index | 34 | 45 | 42 |
| Pollution index | 2,789,290 | 4,584,805 | 2,726,193 |
| Measurement | Total |
| Days measured | 349 |
| Days with good air quality | 340 |
| Days with moderate air quality | 9 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.020% |
| Mercury | 0.030% |
| City | Population | Air Quality Index | National Avg. |
| Penn Estates, PA | 4,688 | 34 | 32.0% |
| Indian Mountain Lake, PA | 4,427 | 34 | 32.0% |
| Pine Ridge, PA | 2,544 | 34 | 32.0% |
| Delaware Water Gap, PA | 661 | 34 | 32.0% |
| Sierra View, PA | 5,539 | 34 | 32.0% |
| Mountainhome, PA | 711 | 34 | 32.0% |
| City | Population | Air Quality Index | National Avg. |
| Cedarville, CA | 711 | 29 | 42.0% |
| Dove Creek, CO | 711 | 44 | 12.0% |
| Lawndale, NC | 711 | 36 | 28.0% |
| Kirtland, NM | 711 | 49 | 2.0% |
| Stetsonville, WI | 711 | 34 | 32.0% |
| Mountainhome, PA | 711 | 34 | 32.0% |
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