| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 37°F | 58°F | 47°F | 2.5" |
| February | 38°F | 59°F | 48°F | 3.6" |
| March | 45°F | 65°F | 55°F | 3.0" |
| April | 53°F | 73°F | 63°F | 2.8" |
| May | 62°F | 79°F | 71°F | 3.8" |
| June | 71°F | 86°F | 78°F | 4.4" |
| July | 74°F | 88°F | 81°F | 5.0" |
| August | 73°F | 87°F | 80°F | 6.6" |
| September | 68°F | 84°F | 76°F | 6.8" |
| October | 56°F | 77°F | 66°F | 6.0" |
| November | 45°F | 67°F | 55°F | 3.2" |
| December | 41°F | 62°F | 51°F | 3.6" |
| Index | Sunset Beach | North Carolina | National |
| Air quality index | 34 | 35 | 42 |
| Pollution index | 4,252,890 | 2,789,538 | 2,726,193 |
| Measurement | Total |
| Days measured | 348 |
| Days with good air quality | 319 |
| Days with moderate air quality | 29 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.090% |
| Lead | 0.020% |
| Mercury | 0.004% |
| City | Population | Air Quality Index | National Avg. |
| Briarcliffe Acres, SC | 540 | 14 | 72.0% |
| North Myrtle Beach, SC | 17,032 | 14 | 72.0% |
| Atlantic Beach, SC | 243 | 14 | 72.0% |
| Holden Beach, NC | 1,011 | 34 | 32.0% |
| Ocean Isle Beach, NC | 760 | 34 | 32.0% |
| Sunset Beach, NC | 4,096 | 34 | 32.0% |
| City | Population | Air Quality Index | National Avg. |
| Mills, WY | 4,096 | 42 | 16.0% |
| Cumberland, Subd. D, NS | 4,097 | n/a | |
| North Alamo, TX | 4,094 | 42 | 16.0% |
| Balm, FL | 4,098 | 43 | 14.0% |
| Bethlehem, NC | 4,098 | 43 | 14.0% |
| Sunset Beach, NC | 4,096 | 34 | 32.0% |