| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 27°F | 43°F | 34°F | 3.5" |
| February | 27°F | 44°F | 35°F | 2.9" |
| March | 34°F | 53°F | 42°F | 3.8" |
| April | 45°F | 65°F | 53°F | 4.4" |
| May | 54°F | 74°F | 63°F | 4.2" |
| June | 64°F | 83°F | 73°F | 4.9" |
| July | 71°F | 89°F | 79°F | 4.3" |
| August | 70°F | 86°F | 77°F | 5.0" |
| September | 64°F | 80°F | 71°F | 3.3" |
| October | 53°F | 69°F | 60°F | 5.1" |
| November | 42°F | 58°F | 49°F | 3.2" |
| December | 34°F | 48°F | 40°F | 4.9" |
| Index | Pelham | New York | National |
| Air quality index | 51 | 43 | 42 |
| Pollution index | 2,299,930 | 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 | 0.002% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Old Greenwich, CT | 6,980 | 43 | 14.0% |
| Thornwood, NY | 4,484 | 43 | 14.0% |
| Glenville, CT | 2,976 | 43 | 14.0% |
| Riverside, CT | 8,855 | 43 | 14.0% |
| Pemberwick, CT | 3,487 | 43 | 14.0% |
| Pelham, NY | 6,957 | 51 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Ocean City, MD | 6,957 | 36 | 28.0% |
| Noble, OK | 6,956 | 48 | 4.0% |
| Westmere, NY | 6,961 | 37 | 26.0% |
| Selma, NC | 6,950 | 40 | 20.0% |
| Huntingdon, PA | 6,950 | 41 | 18.0% |
| Pelham, NY | 6,957 | 51 | 2.0% |
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