| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 17°F | 32°F | 24°F | 2.1" |
| February | 16°F | 32°F | 24°F | 1.9" |
| March | 25°F | 43°F | 33°F | 2.5" |
| April | 36°F | 58°F | 46°F | 3.1" |
| May | 46°F | 69°F | 57°F | 3.5" |
| June | 54°F | 75°F | 64°F | 4.2" |
| July | 58°F | 79°F | 68°F | 4.3" |
| August | 56°F | 77°F | 66°F | 3.9" |
| September | 51°F | 71°F | 60°F | 3.5" |
| October | 42°F | 60°F | 50°F | 4.3" |
| November | 32°F | 48°F | 39°F | 2.2" |
| December | 24°F | 37°F | 30°F | 3.1" |
| Index | Franklinville | New York | National |
| Air quality index | 37 | 43 | 42 |
| Pollution index | 2,885,140 | 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 | 0.004% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.005% |
| Lead | 0.010% |
| Mercury | 0.002% |
| City | Population | Air Quality Index | National Avg. |
| Salamanca, NY | 5,466 | 37 | 26.0% |
| Cuba, NY | 1,452 | 37 | 26.0% |
| Ellicottville, NY | 356 | 37 | 26.0% |
| Springville, NY | 4,290 | 39 | 22.0% |
| Houghton, NY | 1,683 | 39 | 22.0% |
| Franklinville, NY | 1,865 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Erie, IL | 1,865 | 42 | 16.0% |
| Kenyon, MN | 1,865 | 37 | 26.0% |
| Deatsville, AL | 1,864 | 52 | 4.0% |
| Borrego Springs, CA | 1,864 | 64 | 28.0% |
| Sac City, IA | 1,864 | 35 | 30.0% |
| Franklinville, NY | 1,865 | 37 | 26.0% |
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