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| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 25°F | 41°F | 32°F | 3.2" |
| February | 25°F | 40°F | 32°F | 3.0" |
| March | 33°F | 52°F | 42°F | 3.2" |
| April | 44°F | 65°F | 54°F | 4.0" |
| May | 52°F | 74°F | 62°F | 4.0" |
| June | 64°F | 83°F | 73°F | 5.1" |
| July | 67°F | 86°F | 76°F | 5.1" |
| August | 67°F | 85°F | 75°F | 3.5" |
| September | 59°F | 77°F | 67°F | 5.2" |
| October | 47°F | 66°F | 55°F | 4.2" |
| November | 38°F | 55°F | 45°F | 3.2" |
| December | 28°F | 42°F | 35°F | 5.1" |
| Index | Valley Green | Pennsylvania | National |
| Air quality index | 44 | 45 | 42 |
| Pollution index | 11,091,200 | 4,584,805 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 252 |
| Days with moderate air quality | 107 |
| Days w/ poor A.Q. for sensitive groups | 5 |
| Days with unhealthy air quality | 1 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.140% |
| Carbon Tetrachloride | 0.030% |
| Lead | 0.310% |
| Mercury | 0.004% |
| City | Population | Air Quality Index | National Avg. |
| Queens Gate, PA | 1,407 | 41 | 18.0% |
| Dover, PA | 2,124 | 41 | 18.0% |
| Hallam, PA | 2,642 | 41 | 18.0% |
| Shiloh, PA | 10,850 | 41 | 18.0% |
| York, PA | 44,019 | 41 | 18.0% |
| Valley Green, PA | 3,504 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Red Bud, IL | 3,504 | 54 | 8.0% |
| Lyons, KS | 3,504 | 40 | 20.0% |
| Lavon, TX | 3,504 | 51 | 2.0% |
| Broken Bow, NE | 3,503 | 19 | 62.0% |
| Montrose, MN | 3,505 | 46 | 8.0% |
| Valley Green, PA | 3,504 | 44 | 12.0% |
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