| 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 | Northport | 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. |
| Ronkonkoma, NY | 18,953 | 43 | 14.0% |
| Commack, NY | 36,903 | 43 | 14.0% |
| Fort Salonga, NY | 9,930 | 43 | 14.0% |
| Huntington Bay, NY | 1,614 | 43 | 14.0% |
| South Huntington, NY | 10,186 | 43 | 14.0% |
| Northport, NY | 7,297 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Garden Home-Whitford, OR | 7,295 | 38 | 24.0% |
| Longboat Key, FL | 7,299 | 38 | 24.0% |
| Paloma Creek South, TX | 7,299 | 51 | 2.0% |
| Lacombe, LA | 7,294 | 45 | 10.0% |
| West Concord, MA | 7,294 | 43 | 14.0% |
| Northport, NY | 7,297 | 43 | 14.0% |
Here are the best places to live in New York
Most Dangerous States In The US
Check out the 10 safest cities in New York
See the best places to live in Northport