| 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 | Dover Beaches South | New Jersey | National |
| Air quality index | 41 | 45 | 42 |
| Pollution index | 13,232,100 | 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 | 0.010% |
| Benzene | 0.100% |
| Carbon Tetrachloride | 0.030% |
| Lead | 0.020% |
| Mercury | 0.003% |
| City | Population | Air Quality Index | National Avg. |
| Ocean Acres, NJ | 17,325 | 37 | 26.0% |
| Waretown, NJ | 2,514 | 37 | 26.0% |
| Barnegat, NJ | 3,630 | 37 | 26.0% |
| Barnegat Light, NJ | 461 | 37 | 26.0% |
| Forked River, NJ | 5,066 | 37 | 26.0% |
| Dover Beaches South, NJ | 1,230 | 41 | 18.0% |
| City | Population | Air Quality Index | National Avg. |
| Hotchkiss, CO | 1,230 | 44 | 12.0% |
| Canaan, CT | 1,230 | 37 | 26.0% |
| Milford, IL | 1,230 | 42 | 16.0% |
| Culver, IN | 1,230 | 42 | 16.0% |
| Bellerose, NY | 1,230 | 51 | 2.0% |
| Dover Beaches South, NJ | 1,230 | 41 | 18.0% |
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