| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 3°F | 25°F | 14°F | 3.4" |
| February | 1°F | 26°F | 14°F | 1.1" |
| March | 9°F | 36°F | 23°F | 2.5" |
| April | 27°F | 51°F | 39°F | 5.2" |
| May | 34°F | 63°F | 49°F | 4.5" |
| June | 50°F | 78°F | 64°F | 5.1" |
| July | 51°F | 77°F | 64°F | 6.7" |
| August | 51°F | 77°F | 64°F | 2.8" |
| September | 44°F | 72°F | 57°F | 4.7" |
| October | 37°F | 58°F | 47°F | 7.2" |
| November | 22°F | 43°F | 32°F | 4.9" |
| December | 10°F | 28°F | 20°F | 2.8" |
| Index | Wilmington | New York | National |
| Air quality index | 37 | 43 | 42 |
| Pollution index | 3,508,050 | 6,179,275 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 335 |
| Days with moderate air quality | 30 |
| 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. |
| Lake Placid, NY | 2,229 | 37 | 26.0% |
| Peru, NY | 1,557 | 37 | 26.0% |
| Au Sable Forks, NY | 416 | 37 | 26.0% |
| Elizabethtown, NY | 581 | 37 | 26.0% |
| Wilmington, NY | 772 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Altheimer, AR | 772 | 45 | 10.0% |
| Deer Park, CA | 772 | 34 | 32.0% |
| Essex, IA | 772 | 40 | 20.0% |
| Hatfield, IN | 772 | 43 | 14.0% |
| Greensburg, KS | 772 | 15 | 70.0% |
| Wilmington, NY | 772 | 37 | 26.0% |
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