| 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 Manor | New York | National |
| Air quality index | 51 | 43 | 42 |
| Pollution index | 20,242,900 | 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 | 0.050% |
| Benzene | 0.180% |
| Carbon Tetrachloride | 0.060% |
| Lead | 0.160% |
| Mercury | 0.050% |
| City | Population | Air Quality Index | National Avg. |
| Greenwich, CT | 12,967 | 43 | 14.0% |
| Pemberwick, CT | 3,487 | 43 | 14.0% |
| Rye Brook, NY | 9,554 | 43 | 14.0% |
| Old Greenwich, CT | 6,980 | 43 | 14.0% |
| Riverside, CT | 8,855 | 43 | 14.0% |
| Pelham Manor, NY | 5,535 | 51 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Swartz Creek, MI | 5,535 | 38 | 24.0% |
| Duquesne, PA | 5,534 | 56 | 12.0% |
| Byron, MN | 5,536 | 36 | 28.0% |
| Weldon Spring, MO | 5,536 | 54 | 8.0% |
| Bessemer City, NC | 5,536 | 36 | 28.0% |
| Pelham Manor, NY | 5,535 | 51 | 2.0% |
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