| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 25°F | 40°F | 32°F | 3.4" |
| February | 25°F | 40°F | 32°F | 3.7" |
| March | 31°F | 48°F | 39°F | 4.8" |
| April | 41°F | 60°F | 50°F | 5.6" |
| May | 50°F | 68°F | 58°F | 3.9" |
| June | 61°F | 78°F | 69°F | 4.3" |
| July | 67°F | 83°F | 74°F | 5.4" |
| August | 66°F | 82°F | 74°F | 3.1" |
| September | 59°F | 76°F | 67°F | 4.1" |
| October | 48°F | 65°F | 56°F | 6.9" |
| November | 39°F | 55°F | 47°F | 4.0" |
| December | 30°F | 44°F | 37°F | 6.2" |
| Index | Sayville | New York | National |
| Air quality index | 43 | 43 | 42 |
| Pollution index | 39,208,800 | 6,179,275 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 262 |
| Days with moderate air quality | 82 |
| Days w/ poor A.Q. for sensitive groups | 18 |
| Days with unhealthy air quality | 3 |
| 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. |
| Bayport, NY | 8,584 | 43 | 14.0% |
| Brentwood, NY | 62,743 | 43 | 14.0% |
| Holbrook, NY | 25,794 | 43 | 14.0% |
| Ronkonkoma, NY | 18,953 | 43 | 14.0% |
| Mastic, NY | 15,068 | 43 | 14.0% |
| Sayville, NY | 15,910 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Grandville, MI | 15,906 | 38 | 24.0% |
| Cloverly, MD | 15,915 | 47 | 6.0% |
| Discovery Bay, CA | 15,904 | 45 | 10.0% |
| Aberdeen, MD | 15,904 | 46 | 8.0% |
| Indianola, IA | 15,921 | 39 | 22.0% |
| Sayville, NY | 15,910 | 43 | 14.0% |
Here are the best places to live in New York
Safest Cities In The US
Check out the 10 safest cities in New York
These are the largest cities in New York