| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 38°F | 56°F | 46°F | 6.9" |
| February | 39°F | 57°F | 47°F | 6.6" |
| March | 46°F | 64°F | 55°F | 6.9" |
| April | 55°F | 72°F | 63°F | 6.9" |
| May | 63°F | 78°F | 70°F | 8.1" |
| June | 71°F | 84°F | 77°F | 6.2" |
| July | 73°F | 86°F | 79°F | 11.7" |
| August | 72°F | 86°F | 78°F | 8.1" |
| September | 68°F | 82°F | 74°F | 10.0" |
| October | 57°F | 74°F | 65°F | 13.4" |
| November | 46°F | 65°F | 55°F | 8.1" |
| December | 42°F | 60°F | 50°F | 5.0" |
| Index | Southport | 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. |
| Bald Head Island, NC | 209 | 34 | 32.0% |
| Caswell Beach, NC | 578 | 34 | 32.0% |
| St. James, NC | 5,889 | 34 | 32.0% |
| Boiling Spring Lakes, NC | 6,156 | 34 | 32.0% |
| Kure Beach, NC | 2,451 | 34 | 32.0% |
| Southport, NC | 3,860 | 34 | 32.0% |
| City | Population | Air Quality Index | National Avg. |
| Thompson-Nicola P (Rivers and the Peaks), BC | 3,860 | n/a | |
| Beaupré, QC | 3,861 | n/a | |
| Rock Valley, IA | 3,858 | 36 | 28.0% |
| Hansville, WA | 3,858 | 45 | 10.0% |
| Pennsburg, PA | 3,857 | 42 | 16.0% |
| Southport, NC | 3,860 | 34 | 32.0% |
Here are the best places to live in North Carolina
These are the largest cities in North Carolina
Check out the 10 safest cities in North Carolina
Most Dangerous Cities In The US