| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 21°F | 42°F | 31°F | 7.1" |
| February | 23°F | 45°F | 33°F | 5.3" |
| March | 31°F | 54°F | 41°F | 6.5" |
| April | 40°F | 66°F | 52°F | 5.7" |
| May | 49°F | 74°F | 61°F | 6.6" |
| June | 60°F | 85°F | 71°F | 5.5" |
| July | 65°F | 88°F | 76°F | 6.9" |
| August | 62°F | 85°F | 72°F | 10.6" |
| September | 56°F | 78°F | 66°F | 7.9" |
| October | 45°F | 68°F | 55°F | 7.7" |
| November | 35°F | 56°F | 45°F | 6.8" |
| December | 29°F | 48°F | 38°F | 11.9" |
| Index | Barnegat | New Jersey | National |
| Air quality index | 37 | 45 | 42 |
| Pollution index | 10,942,500 | 7,246,891 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 328 |
| Days with moderate air quality | 36 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.110% |
| Carbon Tetrachloride | 0.040% |
| Lead | 0.020% |
| Mercury | 0.005% |
| City | Population | Air Quality Index | National Avg. |
| Waretown, NJ | 2,514 | 37 | 26.0% |
| Manahawkin, NJ | 1,957 | 37 | 26.0% |
| Ship Bottom, NJ | 1,074 | 37 | 26.0% |
| Barnegat Light, NJ | 461 | 37 | 26.0% |
| Beach Haven, NJ | 979 | 37 | 26.0% |
| Barnegat, NJ | 3,630 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Horicon, WI | 3,630 | 40 | 20.0% |
| Hazel Green, AL | 3,629 | 44 | 12.0% |
| Pine Island, MN | 3,629 | 36 | 28.0% |
| Lyman, SC | 3,629 | 44 | 12.0% |
| St. Theresa Point, MB | 3,629 | n/a | |
| Barnegat, NJ | 3,630 | 37 | 26.0% |
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