| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 24°F | 43°F | 33°F | 3.8" |
| February | 25°F | 45°F | 34°F | 3.3" |
| March | 32°F | 54°F | 42°F | 3.9" |
| April | 43°F | 67°F | 54°F | 4.1" |
| May | 53°F | 76°F | 63°F | 4.5" |
| June | 63°F | 84°F | 73°F | 5.5" |
| July | 69°F | 90°F | 79°F | 4.4" |
| August | 67°F | 87°F | 77°F | 4.8" |
| September | 60°F | 81°F | 70°F | 3.2" |
| October | 49°F | 70°F | 59°F | 5.1" |
| November | 38°F | 58°F | 48°F | 3.3" |
| December | 31°F | 48°F | 39°F | 5.0" |
| Index | Forest Hill | Newark | New Jersey |
| Air quality index | 51 | 51 | 45 |
| Pollution index | 7,391,620 | 7,391,620 | 7,246,891 |
| 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 | 0.070% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.040% |
| Lead | 0.020% |
| Mercury | 0.060% |
| City | Population | Air Quality Index | National Avg. |
| Closter, NJ | 8,551 | 51 | 2.0% |
| Hawthorne, NJ | 18,762 | 51 | 2.0% |
| Caldwell, NJ | 7,970 | 51 | 2.0% |
| North Arlington, NJ | 15,681 | 51 | 2.0% |
| Silver Lake CDP (Warren County), NJ | 320 | 51 | 2.0% |
| Newark, NJ | 281,917 | 51 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Saskatoon, SK | 281,340 | n/a | |
| Orlando, FL | 284,817 | 39 | 22.0% |
| Lincoln, NE | 286,388 | 31 | 38.0% |
| Durham, NC | 276,341 | 44 | 12.0% |
| Toledo, OH | 275,116 | 40 | 20.0% |
| Newark, NJ | 281,917 | 51 | 2.0% |
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