| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 26°F | 41°F | 33°F | 4.6" |
| February | 24°F | 39°F | 31°F | 3.2" |
| March | 30°F | 47°F | 38°F | 6.5" |
| April | 41°F | 59°F | 49°F | 10.8" |
| May | 50°F | 68°F | 58°F | 3.5" |
| June | 62°F | 78°F | 69°F | 6.0" |
| July | 67°F | 82°F | 74°F | 8.7" |
| August | 67°F | 83°F | 75°F | 6.0" |
| September | 61°F | 79°F | 69°F | 4.2" |
| October | 52°F | 68°F | 59°F | 16.3" |
| November | 39°F | 55°F | 47°F | 5.8" |
| December | 30°F | 43°F | 36°F | 5.8" |
| Index | Babylon | New York | National |
| Air quality index | 51 | 43 | 42 |
| Pollution index | 39,208,800 | 6,179,275 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 169 |
| Days with moderate air quality | 180 |
| Days w/ poor A.Q. for sensitive groups | 16 |
| Days with unhealthy air quality | 0 |
| 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. |
| Fire Island, NY | 368 | 43 | 14.0% |
| Oakdale, NY | 6,947 | 43 | 14.0% |
| West Sayville, NY | 4,956 | 43 | 14.0% |
| Farmingville, NY | 16,705 | 43 | 14.0% |
| Islandia, NY | 3,315 | 43 | 14.0% |
| Babylon, NY | 12,011 | 51 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Edgewood, WA | 12,010 | 45 | 10.0% |
| Port Lavaca, TX | 12,015 | 31 | 38.0% |
| Norwich, ON | 12,006 | n/a | |
| Durham, NH | 12,016 | 37 | 26.0% |
| Kings, Subd. B, NS | 12,020 | n/a | |
| Babylon, NY | 12,011 | 51 | 2.0% |
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