| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 25°F | 41°F | 32°F | 6.0" |
| February | 21°F | 38°F | 29°F | 3.7" |
| March | 29°F | 50°F | 39°F | 7.0" |
| April | 40°F | 63°F | 51°F | 9.9" |
| May | 48°F | 74°F | 61°F | 3.6" |
| June | 61°F | 83°F | 72°F | 6.9" |
| July | 65°F | 85°F | 74°F | 12.6" |
| August | 65°F | 86°F | 75°F | 5.8" |
| September | 58°F | 82°F | 69°F | 1.1" |
| October | 50°F | 69°F | 58°F | 13.4" |
| November | 35°F | 55°F | 45°F | 4.9" |
| December | 26°F | 40°F | 33°F | 6.6" |
| Index | Stockton | New Jersey | National |
| Air quality index | 41 | 45 | 42 |
| Pollution index | 3,313,920 | 7,246,891 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 280 |
| Days with moderate air quality | 83 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.350% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.004% |
| Lead | 0.350% |
| Mercury | 0.340% |
| City | Population | Air Quality Index | National Avg. |
| Blawenburg, NJ | 99 | 41 | 18.0% |
| New Hope, PA | 2,518 | 41 | 18.0% |
| Flemington, NJ | 4,601 | 41 | 18.0% |
| Mercerville, NJ | 12,783 | 41 | 18.0% |
| White Horse, NJ | 9,557 | 41 | 18.0% |
| Stockton, NJ | 472 | 41 | 18.0% |
| City | Population | Air Quality Index | National Avg. |
| West Point, AL | 472 | 41 | 18.0% |
| Concow, CA | 472 | 46 | 8.0% |
| Cowan, CA | 472 | 49 | 2.0% |
| Peters, CA | 472 | 45 | 10.0% |
| Amana, IA | 472 | 39 | 22.0% |
| Stockton, NJ | 472 | 41 | 18.0% |
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