| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 24°F | 41°F | 33°F | 3.0" |
| February | 24°F | 41°F | 33°F | 3.2" |
| March | 31°F | 49°F | 40°F | 4.2" |
| April | 40°F | 60°F | 50°F | 4.0" |
| May | 50°F | 69°F | 59°F | 3.8" |
| June | 59°F | 78°F | 68°F | 4.2" |
| July | 66°F | 83°F | 75°F | 3.8" |
| August | 64°F | 82°F | 73°F | 3.2" |
| September | 58°F | 76°F | 67°F | 3.7" |
| October | 48°F | 66°F | 57°F | 4.0" |
| November | 37°F | 55°F | 46°F | 3.1" |
| December | 30°F | 47°F | 38°F | 4.9" |
| Index | Calverton | New York | National |
| Air quality index | 41 | 43 | 42 |
| Pollution index | 39,208,800 | 6,179,275 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 280 |
| Days with moderate air quality | 71 |
| Days w/ poor A.Q. for sensitive groups | 12 |
| Days with unhealthy air quality | 2 |
| Pollutant | Total |
| Arsenic | 0.060% |
| Benzene | 0.320% |
| Carbon Tetrachloride | 0.020% |
| Lead | 0.320% |
| Mercury | 0.130% |
| City | Population | Air Quality Index | National Avg. |
| Eastport, NY | 1,902 | 41 | 18.0% |
| Northampton, NY | 1,627 | 41 | 18.0% |
| Quogue, NY | 600 | 41 | 18.0% |
| Riverside, NY | 2,610 | 41 | 18.0% |
| Cutchogue, NY | 2,948 | 41 | 18.0% |
| Calverton, NY | 5,280 | 41 | 18.0% |
| City | Population | Air Quality Index | National Avg. |
| Offutt AFB, NE | 5,280 | 40 | 20.0% |
| Bulverde, TX | 5,279 | 49 | 2.0% |
| Fruitland, MD | 5,281 | 36 | 28.0% |
| Lindale, GA | 5,282 | 44 | 12.0% |
| Brady, TX | 5,282 | 42 | 16.0% |
| Calverton, NY | 5,280 | 41 | 18.0% |
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