| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 19°F | 34°F | 26°F | 2.6" |
| February | 19°F | 34°F | 26°F | 2.1" |
| March | 28°F | 46°F | 36°F | 2.9" |
| April | 39°F | 60°F | 48°F | 3.3" |
| May | 48°F | 68°F | 57°F | 4.5" |
| June | 57°F | 75°F | 66°F | 5.2" |
| July | 61°F | 79°F | 69°F | 4.5" |
| August | 59°F | 77°F | 68°F | 4.4" |
| September | 53°F | 71°F | 62°F | 4.1" |
| October | 43°F | 60°F | 51°F | 3.9" |
| November | 32°F | 49°F | 40°F | 2.6" |
| December | 24°F | 38°F | 31°F | 3.4" |
| Index | Hyndman | Pennsylvania | National |
| Air quality index | 36 | 45 | 42 |
| Pollution index | 314,680 | 4,584,805 | 2,726,193 |
| Measurement | Total |
| Days measured | 359 |
| Days with good air quality | 340 |
| Days with moderate air quality | 19 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.004% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Klondike, MD | 157 | 36 | 28.0% |
| Woodland, MD | 31 | 36 | 28.0% |
| Bowmans Addition, MD | 669 | 36 | 28.0% |
| Flintstone, MD | 198 | 36 | 28.0% |
| Carpendale, WV | 1,001 | 36 | 28.0% |
| Hyndman, PA | 947 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Susan Moore, AL | 947 | 43 | 14.0% |
| Otisville, MI | 947 | 38 | 24.0% |
| Grantwood Village, MO | 947 | 54 | 8.0% |
| Waverly, MO | 947 | 47 | 6.0% |
| Hays, MT | 947 | 21 | 58.0% |
| Hyndman, PA | 947 | 36 | 28.0% |
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