| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 24°F | 40°F | 31°F | 5.0" |
| February | 21°F | 38°F | 29°F | 3.2" |
| March | 27°F | 49°F | 37°F | 8.8" |
| April | 39°F | 62°F | 50°F | 10.1" |
| May | 49°F | 73°F | 61°F | 2.7" |
| June | 61°F | 83°F | 72°F | 6.6" |
| July | 65°F | 85°F | 75°F | 8.4" |
| August | 65°F | 86°F | 75°F | 7.9" |
| September | 56°F | 81°F | 68°F | 2.2" |
| October | 49°F | 68°F | 58°F | 15.6" |
| November | 34°F | 55°F | 44°F | 6.5" |
| December | 26°F | 40°F | 33°F | 8.0" |
| Index | Haledon | New Jersey | National |
| Air quality index | 51 | 45 | 42 |
| Pollution index | 2,548,930 | 7,246,891 | 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 | 0.003% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.003% |
| Lead | 0.020% |
| Mercury | 0.002% |
| City | Population | Air Quality Index | National Avg. |
| Franklin Lakes, NJ | 11,044 | 51 | 2.0% |
| Oakland, NJ | 12,953 | 51 | 2.0% |
| Saddle River, NJ | 3,180 | 51 | 2.0% |
| Tappan, NY | 7,415 | 51 | 2.0% |
| Englewood Cliffs, NJ | 5,349 | 51 | 2.0% |
| Haledon, NJ | 8,298 | 51 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Mystic Island, NJ | 8,296 | 37 | 26.0% |
| Delavan, WI | 8,296 | 37 | 26.0% |
| Applewood, CO | 8,300 | 58 | 16.0% |
| Boonville, MO | 8,300 | 38 | 24.0% |
| Price, UT | 8,303 | 46 | 8.0% |
| Haledon, NJ | 8,298 | 51 | 2.0% |
Here are the best places to live in New Jersey
Top 10 cities in New Jersey with the best education system
Top 10 best public schools in Haledon
These are the 10 most affordable cities in New Jersey