| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 16°F | 35°F | 26°F | 1.7" |
| February | 16°F | 37°F | 26°F | 1.5" |
| March | 24°F | 47°F | 35°F | 2.3" |
| April | 34°F | 61°F | 47°F | 2.9" |
| May | 44°F | 72°F | 58°F | 2.9" |
| June | 54°F | 80°F | 67°F | 4.0" |
| July | 58°F | 84°F | 71°F | 3.2" |
| August | 56°F | 82°F | 68°F | 4.3" |
| September | 49°F | 75°F | 62°F | 3.3" |
| October | 40°F | 63°F | 51°F | 3.9" |
| November | 29°F | 51°F | 40°F | 2.0" |
| December | 23°F | 40°F | 31°F | 2.2" |
| Index | Elmira | New York | National |
| Air quality index | 35 | 43 | 42 |
| Pollution index | 2,885,140 | 6,179,275 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 349 |
| Days with moderate air quality | 16 |
| 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. |
| West Elmira, NY | 4,745 | 35 | 30.0% |
| Big Flats, NY | 5,523 | 35 | 30.0% |
| Horseheads, NY | 6,388 | 35 | 30.0% |
| Elmira Heights, NY | 4,206 | 35 | 30.0% |
| Millport, NY | 442 | 35 | 30.0% |
| Elmira, NY | 27,236 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Horn Lake, MS | 27,234 | 45 | 10.0% |
| Mint Hill, NC | 27,258 | 49 | 2.0% |
| Dieppe, NB | 27,260 | n/a | |
| New Smyrna Beach, FL | 27,207 | 37 | 26.0% |
| Lake Jackson, TX | 27,269 | 52 | 4.0% |
| Elmira, NY | 27,236 | 35 | 30.0% |
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