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| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 21°F | 41°F | 31°F | 2.8" |
| February | 22°F | 43°F | 31°F | 2.3" |
| March | 30°F | 53°F | 41°F | 3.7" |
| April | 39°F | 66°F | 52°F | 4.0" |
| May | 49°F | 75°F | 62°F | 3.7" |
| June | 58°F | 83°F | 70°F | 5.3" |
| July | 63°F | 87°F | 75°F | 5.3" |
| August | 61°F | 85°F | 72°F | 5.5" |
| September | 55°F | 79°F | 66°F | 3.6" |
| October | 43°F | 68°F | 55°F | 4.5" |
| November | 33°F | 56°F | 44°F | 3.0" |
| December | 27°F | 46°F | 36°F | 4.6" |
| Index | Bernardsville | New Jersey | National |
| Air quality index | 51 | 45 | 42 |
| Pollution index | 8,169,930 | 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 | 0.010% |
| Benzene | 0.070% |
| Carbon Tetrachloride | 0.030% |
| Lead | 0.020% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Allamuchy, NJ | 116 | 34 | 32.0% |
| Chester, NJ | 1,554 | 34 | 32.0% |
| Long Valley, NJ | 2,391 | 34 | 32.0% |
| Stanhope, NJ | 3,418 | 34 | 32.0% |
| Vienna, NJ | 1,051 | 34 | 32.0% |
| Bernardsville, NJ | 7,804 | 51 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Lamar, CO | 7,804 | 20 | 60.0% |
| Puslinch, ON | 7,805 | n/a | |
| Kaufman, TX | 7,802 | 51 | 2.0% |
| Palmyra, PA | 7,808 | 42 | 16.0% |
| Hartsville, SC | 7,799 | 40 | 20.0% |
| Bernardsville, NJ | 7,804 | 51 | 2.0% |
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