| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 25°F | 41°F | 33°F | 2.7" |
| February | 25°F | 42°F | 33°F | 2.3" |
| March | 32°F | 50°F | 40°F | 3.3" |
| April | 42°F | 60°F | 51°F | 3.7" |
| May | 52°F | 70°F | 60°F | 3.4" |
| June | 61°F | 78°F | 69°F | 4.3" |
| July | 68°F | 84°F | 76°F | 3.2" |
| August | 66°F | 83°F | 74°F | 3.4" |
| September | 60°F | 76°F | 68°F | 3.2" |
| October | 50°F | 66°F | 57°F | 3.5" |
| November | 39°F | 55°F | 47°F | 2.5" |
| December | 32°F | 46°F | 39°F | 4.5" |
| Index | Muttontown | New York | National |
| Air quality index | 51 | 43 | 42 |
| Pollution index | 22,367,000 | 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 | 0.040% |
| Benzene | 0.180% |
| Carbon Tetrachloride | 0.070% |
| Lead | 0.050% |
| Mercury | 0.050% |
| City | Population | Air Quality Index | National Avg. |
| Greenwich, CT | 12,967 | 43 | 14.0% |
| Dix Hills, NY | 23,995 | 43 | 14.0% |
| East Northport, NY | 20,085 | 43 | 14.0% |
| Greenlawn, NY | 14,598 | 43 | 14.0% |
| Huntington Station, NY | 33,612 | 43 | 14.0% |
| Muttontown, NY | 3,660 | 51 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Port Monmouth, NJ | 3,660 | 51 | 2.0% |
| Mount Repose, OH | 3,661 | 54 | 8.0% |
| Harrington, DE | 3,658 | 42 | 16.0% |
| Watergate, FL | 3,658 | 41 | 18.0% |
| Kelseyville, CA | 3,657 | 31 | 38.0% |
| Muttontown, NY | 3,660 | 51 | 2.0% |
Here are the best places to live in New York
Check out the 10 most dangerous cities in New York
These are the largest cities in New York
Safest States In The US