| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 17°F | 31°F | 24°F | 0.8" |
| February | 15°F | 29°F | 22°F | 1.2" |
| March | 22°F | 40°F | 31°F | 2.1" |
| April | 35°F | 55°F | 45°F | 0.5" |
| May | 43°F | 67°F | 56°F | 0.7" |
| June | 57°F | 80°F | 69°F | 0.1" |
| July | 60°F | 81°F | 70°F | 2.6" |
| August | 59°F | 83°F | 70°F | 3.8" |
| September | 52°F | 76°F | 63°F | 3.3" |
| October | 44°F | 63°F | 52°F | 4.0" |
| November | 31°F | 49°F | 39°F | 3.8" |
| December | 20°F | 33°F | 27°F | 1.9" |
| Index | Interlaken | New York | National |
| Air quality index | 34 | 43 | 42 |
| Pollution index | 2,885,140 | 6,179,275 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 358 |
| Days with moderate air quality | 7 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| 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. |
| Northwest Ithaca, NY | 2,092 | 34 | 32.0% |
| Ithaca, NY | 30,715 | 34 | 32.0% |
| Ovid, NY | 486 | 34 | 32.0% |
| Trumansburg, NY | 1,629 | 34 | 32.0% |
| Cayuga Heights, NY | 3,642 | 34 | 32.0% |
| Interlaken, NY | 576 | 34 | 32.0% |
| City | Population | Air Quality Index | National Avg. |
| Onyx, CA | 576 | 67 | 34.0% |
| Yankeetown, FL | 576 | 30 | 40.0% |
| Coolidge, GA | 576 | 35 | 30.0% |
| Whittemore, IA | 576 | 15 | 70.0% |
| Island, KY | 576 | 43 | 14.0% |
| Interlaken, NY | 576 | 34 | 32.0% |
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