| 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 | 44 | 43 | 50 |
| Pollution index | 4,117,250 | 9,373,057 | 5,066,862 |
| Measurement | Total |
| Days measured | 349 |
| Days with good air quality | 234 |
| Days with moderate air quality | 109 |
| Days w/ poor A.Q. for sensitive groups | 6 |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.050% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.010% |
| Mercury | 0.010% |
| City, State | Population | Air Quality Index | National Avg. |
| Amagansett, NY | 1,055 | 44 | 12% |
| Napeague, NY | 165 | 44 | 12% |
| East Hampton, NY | 1,220 | 44 | 12% |
| Northwest Harbor, NY | 3,188 | 44 | 12% |
| East Hampton North, NY | 4,127 | 44 | 12% |
| Montauk, NY | 3,510 | 44 | 12% |
| City, State | Population | Air Quality Index | National Avg. |
| Alma, GA | 3,511 | 32 | 36% |
| Oxford, MI | 3,511 | 38 | 24% |
| Tilton Northfield, NH | 3,512 | 29 | 42% |
| Middlebury, IN | 3,512 | 46 | 8% |
| Maple Heights-Lake Desire, WA | 3,512 | 49 | 2% |
| Montauk, NY | 3,510 | 44 | 12% |