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| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 19°F | 33°F | 26°F | 4.0" |
| February | 18°F | 34°F | 26°F | 3.9" |
| March | 28°F | 45°F | 35°F | 4.3" |
| April | 38°F | 60°F | 48°F | 5.1" |
| May | 48°F | 70°F | 58°F | 5.4" |
| June | 56°F | 77°F | 66°F | 6.8" |
| July | 60°F | 81°F | 70°F | 7.9" |
| August | 59°F | 79°F | 68°F | 7.0" |
| September | 53°F | 73°F | 62°F | 5.2" |
| October | 43°F | 61°F | 51°F | 4.8" |
| November | 33°F | 49°F | 40°F | 3.8" |
| December | 25°F | 37°F | 30°F | 3.4" |
| Index | Knox | Pennsylvania | National |
| Air quality index | 33 | 45 | 42 |
| Pollution index | 601,986 | 4,584,805 | 2,726,193 |
| Measurement | Total |
| Days measured | 359 |
| Days with good air quality | 357 |
| Days with moderate air quality | 2 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.010% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Crown, PA | 229 | 9 | 82.0% |
| Woodland Heights, PA | 1,146 | 9 | 82.0% |
| Hasson Heights, PA | 1,495 | 9 | 82.0% |
| Oil City, PA | 9,750 | 9 | 82.0% |
| Tylersburg, PA | 99 | 9 | 82.0% |
| Knox, PA | 1,008 | 33 | 34.0% |
| City | Population | Air Quality Index | National Avg. |
| New Union, AL | 1,008 | 43 | 14.0% |
| West Cape May, NJ | 1,008 | 42 | 16.0% |
| Neffs, OH | 1,008 | 39 | 22.0% |
| Reid Hope King, TX | 1,008 | 44 | 12.0% |
| Rice, TX | 1,008 | 41 | 18.0% |
| Knox, PA | 1,008 | 33 | 34.0% |
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