| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 29°F | 43°F | 36°F | 4.6" |
| February | 30°F | 44°F | 36°F | 3.9" |
| March | 36°F | 52°F | 43°F | 6.1" |
| April | 46°F | 62°F | 53°F | 4.3" |
| May | 55°F | 71°F | 63°F | 5.1" |
| June | 65°F | 80°F | 72°F | 8.3" |
| July | 70°F | 85°F | 77°F | 6.9" |
| August | 68°F | 83°F | 75°F | 11.2" |
| September | 62°F | 77°F | 69°F | 9.5" |
| October | 52°F | 68°F | 59°F | 6.7" |
| November | 41°F | 57°F | 49°F | 5.5" |
| December | 35°F | 49°F | 42°F | 9.2" |
| Index | Cape May | New Jersey | National |
| Air quality index | 40 | 45 | 42 |
| Pollution index | 5,772,270 | 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 | 0.030% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.030% |
| Mercury | 0.030% |
| City | Population | Air Quality Index | National Avg. |
| Lewes, DE | 3,266 | 36 | 28.0% |
| Henlopen Acres, DE | 187 | 36 | 28.0% |
| North Wildwood, NJ | 3,794 | 37 | 26.0% |
| Wildwood, NJ | 4,985 | 37 | 26.0% |
| Avalon, NJ | 1,456 | 37 | 26.0% |
| Cape May, NJ | 3,446 | 40 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| Red Oak, NC | 3,446 | 36 | 28.0% |
| Woodstown, NJ | 3,445 | 40 | 20.0% |
| Mariemont, OH | 3,445 | 54 | 8.0% |
| Malvern, PA | 3,445 | 51 | 2.0% |
| Blissfield, MI | 3,447 | 39 | 22.0% |
| Cape May, NJ | 3,446 | 40 | 20.0% |
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