| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 25°F | 43°F | 34°F | 3.4" |
| February | 26°F | 44°F | 34°F | 2.8" |
| March | 33°F | 52°F | 41°F | 3.7" |
| April | 43°F | 63°F | 52°F | 3.7" |
| May | 52°F | 71°F | 61°F | 4.2" |
| June | 62°F | 81°F | 71°F | 4.7" |
| July | 69°F | 86°F | 77°F | 4.2" |
| August | 68°F | 85°F | 76°F | 4.8" |
| September | 61°F | 79°F | 69°F | 3.4" |
| October | 51°F | 68°F | 59°F | 4.8" |
| November | 39°F | 57°F | 48°F | 3.0" |
| December | 32°F | 48°F | 40°F | 4.9" |
| Index | Malverne | New York | National |
| Air quality index | 51 | 43 | 42 |
| Pollution index | 20,796,900 | 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 | 0.130% |
| Carbon Tetrachloride | 0.130% |
| Lead | 0.070% |
| Mercury | 0.060% |
| City | Population | Air Quality Index | National Avg. |
| Laurel Hollow, NY | 1,967 | 43 | 14.0% |
| South Huntington, NY | 10,186 | 43 | 14.0% |
| Cold Spring Harbor, NY | 2,864 | 43 | 14.0% |
| Halesite, NY | 2,483 | 43 | 14.0% |
| West Hills, NY | 5,225 | 43 | 14.0% |
| Malverne, NY | 8,516 | 51 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Cumberland Hill, RI | 8,515 | 44 | 12.0% |
| Plympton-Wyoming, ON | 8,517 | n/a | |
| Park Hills, MO | 8,512 | 54 | 8.0% |
| Boonton, NJ | 8,510 | 51 | 2.0% |
| Indian Harbour Beach, FL | 8,509 | 36 | 28.0% |
| Malverne, NY | 8,516 | 51 | 2.0% |
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