| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 18°F | 30°F | 24°F | 2.1" |
| February | 17°F | 30°F | 23°F | 2.4" |
| March | 26°F | 42°F | 33°F | 2.5" |
| April | 37°F | 56°F | 46°F | 3.3" |
| May | 48°F | 67°F | 57°F | 7.0" |
| June | 56°F | 73°F | 64°F | 7.2" |
| July | 60°F | 77°F | 68°F | 6.9" |
| August | 58°F | 75°F | 66°F | 5.3" |
| September | 52°F | 70°F | 60°F | 5.7" |
| October | 43°F | 58°F | 49°F | 4.7" |
| November | 33°F | 46°F | 39°F | 2.9" |
| December | 25°F | 36°F | 30°F | 2.8" |
| Index | Sinclairville | New York | National |
| Air quality index | 37 | 43 | 42 |
| Pollution index | 3,205,550 | 6,179,275 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 337 |
| Days with moderate air quality | 27 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.170% |
| Mercury | 0.005% |
| City | Population | Air Quality Index | National Avg. |
| Bemus Point, NY | 235 | 37 | 26.0% |
| Kennedy, NY | 261 | 37 | 26.0% |
| Cherry Creek, NY | 484 | 37 | 26.0% |
| Forestville, NY | 820 | 37 | 26.0% |
| Perrysburg, NY | 437 | 37 | 26.0% |
| Sinclairville, NY | 624 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Gould, AR | 624 | 43 | 14.0% |
| East Orosi, CA | 624 | 66 | 32.0% |
| Tabernash, CO | 624 | 47 | 6.0% |
| East Newnan, GA | 624 | 52 | 4.0% |
| Franklin, IL | 624 | 40 | 20.0% |
| Sinclairville, NY | 624 | 37 | 26.0% |
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