| 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. |
| Fishers Island, NY | 61 | 37 | 26.0% |
| Amagansett, NY | 510 | 37 | 26.0% |
| Napeague, NY | 124 | 37 | 26.0% |
| East Hampton, NY | 920 | 37 | 26.0% |
| Northwest Harbor, NY | 4,138 | 37 | 26.0% |
| Montauk, NY | 3,563 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Mission Hills, KS | 3,563 | 47 | 6.0% |
| El Dorado Springs, MO | 3,562 | 37 | 26.0% |
| Barnesville, OH | 3,562 | 39 | 22.0% |
| Indianola, WA | 3,564 | 45 | 10.0% |
| Centerville, TN | 3,561 | 31 | 38.0% |
| Montauk, NY | 3,563 | 37 | 26.0% |
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