| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 27°F | 41°F | 33°F | 4.3" |
| February | 26°F | 43°F | 34°F | 4.2" |
| March | 32°F | 51°F | 40°F | 3.4" |
| April | 44°F | 65°F | 53°F | 2.9" |
| May | 54°F | 75°F | 63°F | 5.6" |
| June | 63°F | 82°F | 72°F | 5.9" |
| July | 70°F | 87°F | 77°F | 4.9" |
| August | 68°F | 85°F | 76°F | 2.9" |
| September | 62°F | 80°F | 70°F | 3.0" |
| October | 52°F | 68°F | 60°F | 3.7" |
| November | 39°F | 56°F | 47°F | 3.2" |
| December | 35°F | 48°F | 41°F | 4.7" |
| Index | Bloomfield-Chelsea-Travis | New York | New York |
| Air quality index | 51 | 51 | 43 |
| Pollution index | 9,503,730 | 2,225,400 | 6,179,275 |
| 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 | 0.003% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.004% |
| Mercury | 0.002% |
| City | Population | Air Quality Index | National Avg. |
| Highland Park, NJ | 13,803 | 41 | 18.0% |
| Milltown, NJ | 6,973 | 41 | 18.0% |
| South River, NJ | 15,874 | 41 | 18.0% |
| Old Bridge, NJ | 27,836 | 41 | 18.0% |
| New Brunswick, NJ | 55,992 | 41 | 18.0% |
| New York, NY | 8,379,552 | 51 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Los Angeles, CA | 3,973,278 | 72 | 44.0% |
| Toronto, ON | 3,013,752 | n/a | |
| Chicago, IL | 2,699,347 | 55 | 10.0% |
| New York, NY | 8,379,552 | 51 | 2.0% |
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