| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 12°F | 30°F | 21°F | 1.0" |
| February | 13°F | 32°F | 22°F | 1.3" |
| March | 21°F | 41°F | 31°F | 1.5" |
| April | 34°F | 57°F | 45°F | 2.6" |
| May | 45°F | 70°F | 57°F | 3.6" |
| June | 54°F | 76°F | 65°F | 5.2" |
| July | 59°F | 81°F | 70°F | 4.3" |
| August | 57°F | 79°F | 68°F | 3.6" |
| September | 50°F | 73°F | 61°F | 2.8" |
| October | 40°F | 60°F | 50°F | 3.6" |
| November | 29°F | 47°F | 38°F | 1.8" |
| December | 18°F | 35°F | 27°F | 2.0" |
| Index | Lyon Mountain | New York | National |
| Air quality index | 0 | 43 | 42 |
| Pollution index | 3,508,050 | 6,179,275 | 2,726,193 |
| Measurement | Total |
| Days measured | 356 |
| Days with good air quality | 356 |
| Days with moderate air quality | 0 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.004% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.005% |
| Lead | 0.010% |
| Mercury | 0.003% |
| City | Population | Air Quality Index | National Avg. |
| Altona, NY | 819 | 0 | 100.0% |
| Redford, NY | 258 | 0 | 100.0% |
| Burke, NY | 238 | 0 | 100.0% |
| Chateaugay, NY | 896 | 0 | 100.0% |
| Dannemora, NY | 4,060 | 37 | 26.0% |
| Lyon Mountain, NY | 287 | 0 | 100.0% |
| City | Population | Air Quality Index | National Avg. |
| Bowles, CA | 287 | 60 | 20.0% |
| Iroquois, IL | 287 | 42 | 16.0% |
| Mentor, KY | 287 | 54 | 8.0% |
| Parsonsburg, MD | 287 | 36 | 28.0% |
| Pecktonville, MD | 287 | 40 | 20.0% |
| Lyon Mountain, NY | 287 | 0 | 100.0% |
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