| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 39°F | 55°F | 46°F | 2.4" |
| February | 41°F | 58°F | 48°F | 2.4" |
| March | 48°F | 64°F | 55°F | 4.9" |
| April | 57°F | 72°F | 64°F | 11.2" |
| May | 66°F | 79°F | 72°F | 3.2" |
| June | 73°F | 86°F | 78°F | 2.1" |
| July | 75°F | 88°F | 81°F | 2.8" |
| August | 73°F | 86°F | 79°F | 1.7" |
| September | 69°F | 82°F | 75°F | 1.1" |
| October | 59°F | 74°F | 66°F | 4.2" |
| November | 48°F | 65°F | 56°F | 1.0" |
| December | 45°F | 60°F | 51°F | 3.1" |
| Index | Myrtle Grove | 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. |
| Carolina Beach, NC | 6,472 | 34 | 32.0% |
| Silver Lake, NC | 6,355 | 34 | 32.0% |
| Blue Clay Farms, NC | 53 | 34 | 32.0% |
| Murraysville, NC | 16,676 | 34 | 32.0% |
| Ogden, NC | 9,359 | 34 | 32.0% |
| Myrtle Grove, NC | 12,355 | 34 | 32.0% |
| City | Population | Air Quality Index | National Avg. |
| Newcastle, WA | 12,354 | 45 | 10.0% |
| Wellesley, ON | 12,358 | n/a | |
| Lansing, KS | 12,363 | 47 | 6.0% |
| Spring Lake, NC | 12,346 | 41 | 18.0% |
| Norton, OH | 12,365 | 43 | 14.0% |
| Myrtle Grove, NC | 12,355 | 34 | 32.0% |