| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 28°F | 41°F | 35°F | 3.6" |
| February | 28°F | 41°F | 34°F | 3.4" |
| March | 33°F | 47°F | 39°F | 4.4" |
| April | 42°F | 57°F | 48°F | 3.9" |
| May | 50°F | 66°F | 57°F | 3.9" |
| June | 59°F | 75°F | 66°F | 4.7" |
| July | 67°F | 81°F | 73°F | 3.8" |
| August | 66°F | 80°F | 73°F | 3.8" |
| September | 61°F | 74°F | 67°F | 3.7" |
| October | 52°F | 65°F | 58°F | 5.0" |
| November | 42°F | 55°F | 48°F | 3.6" |
| December | 34°F | 47°F | 41°F | 5.2" |
| Index | Montauk | New York | National |
| Air quality index | 37 | 43 | 42 |
| Pollution index | 4,117,250 | 6,179,275 | 2,726,193 |
| Measurement | Total |
| Days measured | 364 |
| Days with good air quality | 323 |
| Days with moderate air quality | 34 |
| Days w/ poor A.Q. for sensitive groups | 7 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.050% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.010% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| East Hampton North, NY | 4,331 | 37 | 26.0% |
| Springs, NY | 7,507 | 37 | 26.0% |
| Fishers Island, NY | 63 | 37 | 26.0% |
| Amagansett, NY | 530 | 37 | 26.0% |
| Napeague, NY | 128 | 37 | 26.0% |
| Montauk, NY | 3,644 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Roselawn, IN | 3,644 | 37 | 26.0% |
| Morris-Turnberry, ON | 3,644 | n/a | |
| Willcox, AZ | 3,643 | 45 | 10.0% |
| Vivian, LA | 3,643 | 39 | 22.0% |
| Marienville, PA | 3,643 | 9 | 82.0% |
| Montauk, NY | 3,644 | 37 | 26.0% |