| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 20°F | 38°F | 29°F | 5.4" |
| February | 17°F | 36°F | 27°F | 3.0" |
| March | 23°F | 46°F | 34°F | 6.4" |
| April | 35°F | 60°F | 48°F | 7.4" |
| May | 45°F | 69°F | 57°F | 2.4" |
| June | 57°F | 80°F | 68°F | 3.6" |
| July | 61°F | 83°F | 71°F | 7.7" |
| August | 62°F | 82°F | 72°F | 6.0" |
| September | 53°F | 78°F | 65°F | 1.7" |
| October | 45°F | 66°F | 55°F | 15.3" |
| November | 31°F | 53°F | 42°F | 6.6" |
| December | 22°F | 38°F | 30°F | 7.4" |
| Index | Watchtower | New York | National |
| Air quality index | 36 | 43 | 42 |
| Pollution index | 161,427 | 6,179,275 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 319 |
| Days with moderate air quality | 46 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.002% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Hopewell Junction, NY | 725 | 36 | 28.0% |
| Heritage Hills, NY | 4,309 | 36 | 28.0% |
| Mahopac, NY | 8,914 | 36 | 28.0% |
| Brewster Hill, NY | 2,574 | 36 | 28.0% |
| Lake Carmel, NY | 8,287 | 36 | 28.0% |
| Watchtower, NY | 2,092 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Wanchese, NC | 2,092 | 40 | 20.0% |
| Northwest Ithaca, NY | 2,092 | 34 | 32.0% |
| South Zanesville, OH | 2,092 | 25 | 50.0% |
| Liberty City, TX | 2,092 | 37 | 26.0% |
| Lopezville, TX | 2,092 | 42 | 16.0% |
| Watchtower, NY | 2,092 | 36 | 28.0% |
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