| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 16°F | 33°F | 24°F | 1.2" |
| February | 16°F | 33°F | 24°F | 2.1" |
| March | 24°F | 43°F | 33°F | 2.1" |
| April | 35°F | 58°F | 46°F | 2.6" |
| May | 46°F | 70°F | 58°F | 3.2" |
| June | 54°F | 77°F | 65°F | 5.0" |
| July | 59°F | 82°F | 70°F | 6.3" |
| August | 57°F | 79°F | 68°F | 6.1" |
| September | 51°F | 73°F | 61°F | 4.8" |
| October | 41°F | 61°F | 50°F | 4.3" |
| November | 31°F | 49°F | 39°F | 2.5" |
| December | 23°F | 38°F | 30°F | 1.9" |
| Index | Ithaca | 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. |
| Newfield Hamlet, NY | 759 | 34 | 32.0% |
| Freeville, NY | 432 | 34 | 32.0% |
| Candor, NY | 899 | 34 | 32.0% |
| Interlaken, NY | 576 | 34 | 32.0% |
| Odessa, NY | 542 | 34 | 32.0% |
| Ithaca, NY | 30,715 | 34 | 32.0% |
| City | Population | Air Quality Index | National Avg. |
| Sahuarita, AZ | 30,679 | 47 | 6.0% |
| Sainte-Julie, QC | 30,753 | n/a | |
| Brooklyn Center, MN | 30,755 | 46 | 8.0% |
| Winter Park, FL | 30,764 | 39 | 22.0% |
| Drexel Heights, AZ | 30,780 | 47 | 6.0% |
| Ithaca, NY | 30,715 | 34 | 32.0% |
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