| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 24°F | 43°F | 34°F | 3.1" |
| February | 24°F | 45°F | 35°F | 2.4" |
| March | 32°F | 54°F | 42°F | 3.8" |
| April | 42°F | 66°F | 54°F | 4.2" |
| May | 51°F | 75°F | 62°F | 3.4" |
| June | 61°F | 83°F | 72°F | 5.3" |
| July | 67°F | 88°F | 77°F | 4.3" |
| August | 64°F | 85°F | 75°F | 5.0" |
| September | 58°F | 80°F | 68°F | 3.3" |
| October | 47°F | 69°F | 57°F | 4.6" |
| November | 36°F | 58°F | 46°F | 3.0" |
| December | 29°F | 49°F | 39°F | 4.8" |
| Index | Newfield | New Jersey | National |
| Air quality index | 40 | 45 | 42 |
| Pollution index | 3,463,050 | 7,246,891 | 2,726,193 |
| Measurement | Total |
| Days measured | 361 |
| Days with good air quality | 297 |
| Days with moderate air quality | 61 |
| Days w/ poor A.Q. for sensitive groups | 3 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.050% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.060% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Millville, NJ | 27,485 | 40 | 20.0% |
| Folsom, NJ | 1,610 | 40 | 20.0% |
| Barclay, NJ | 4,044 | 40 | 20.0% |
| Rosenhayn, NJ | 1,321 | 40 | 20.0% |
| Cedarville, NJ | 930 | 40 | 20.0% |
| Newfield, NJ | 1,502 | 40 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| Newton, AL | 1,502 | 35 | 30.0% |
| Greene, NY | 1,502 | 34 | 32.0% |
| Chapel Hill, TN | 1,502 | 31 | 38.0% |
| Saint-Aubert, QC | 1,502 | n/a | |
| Meadview, AZ | 1,503 | 54 | 8.0% |
| Newfield, NJ | 1,502 | 40 | 20.0% |
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