| 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 | Big Flats | 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. |
| Odessa, NY | 555 | 34 | 32.0% |
| Painted Post, NY | 1,751 | 35 | 30.0% |
| Southport, NY | 7,033 | 35 | 30.0% |
| Pine Valley, NY | 506 | 35 | 30.0% |
| Millerton, PA | 414 | 35 | 30.0% |
| Big Flats, NY | 5,674 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Anamosa, IA | 5,674 | 39 | 22.0% |
| Ulysses, KS | 5,677 | 15 | 70.0% |
| Stroudsburg, PA | 5,677 | 34 | 32.0% |
| Waynesboro, GA | 5,670 | 47 | 6.0% |
| Exeter, PA | 5,678 | 38 | 24.0% |
| Big Flats, NY | 5,674 | 35 | 30.0% |