| 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 | Homer | New York | National |
| Air quality index | 34 | 43 | 42 |
| Pollution index | 1,654,400 | 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 | 0.002% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.003% |
| Lead | 0.004% |
| Mercury | 0.002% |
| City | Population | Air Quality Index | National Avg. |
| Virgil, NY | 574 | 34 | 32.0% |
| Moravia, NY | 1,411 | 34 | 32.0% |
| Cortland, NY | 18,633 | 34 | 32.0% |
| Munsons Corners, NY | 2,906 | 34 | 32.0% |
| Dryden, NY | 2,127 | 34 | 32.0% |
| Homer, NY | 3,103 | 34 | 32.0% |
| City | Population | Air Quality Index | National Avg. |
| Parowan, UT | 3,104 | 44 | 12.0% |
| Harbour Grace, NL | 3,104 | n/a | |
| Athabasca, AB | 3,104 | n/a | |
| Buffalo, MO | 3,101 | 39 | 22.0% |
| Westhampton, NY | 3,105 | 41 | 18.0% |
| Homer, NY | 3,103 | 34 | 32.0% |
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