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 | Greenlawn | 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. |
Old Greenwich, CT | 6,980 | 43 | 14.0% |
Brentwood, NY | 62,743 | 43 | 14.0% |
Sayville, NY | 15,910 | 43 | 14.0% |
East Northport, NY | 20,085 | 43 | 14.0% |
Halesite, NY | 2,483 | 43 | 14.0% |
Greenlawn, NY | 14,598 | 43 | 14.0% |
City | Population | Air Quality Index | National Avg. |
Ferndale, WA | 14,591 | 34 | 32.0% |
Yankton, SD | 14,619 | 36 | 28.0% |
Homosassa Springs, FL | 14,566 | 30 | 40.0% |
Thibodaux, LA | 14,565 | 41 | 18.0% |
Roanoke Rapids, NC | 14,562 | 36 | 28.0% |
Greenlawn, NY | 14,598 | 43 | 14.0% |