| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 30°F | 52°F | 40°F | 5.6" |
| February | 30°F | 56°F | 42°F | 5.0" |
| March | 39°F | 65°F | 51°F | 4.3" |
| April | 47°F | 74°F | 60°F | 5.0" |
| May | 56°F | 80°F | 67°F | 7.1" |
| June | 64°F | 88°F | 75°F | 4.1" |
| July | 68°F | 90°F | 78°F | 5.7" |
| August | 68°F | 89°F | 77°F | 6.1" |
| September | 62°F | 83°F | 71°F | 3.2" |
| October | 49°F | 73°F | 60°F | 3.7" |
| November | 38°F | 63°F | 49°F | 4.8" |
| December | 35°F | 56°F | 45°F | 5.4" |
| Index | Mount Pleasant | North Carolina | National |
| Air quality index | 40 | 35 | 42 |
| Pollution index | 13,834,800 | 2,789,538 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 292 |
| Days with moderate air quality | 73 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.020% |
| Benzene | 0.170% |
| Carbon Tetrachloride | 0.050% |
| Lead | 0.030% |
| Mercury | 0.100% |
| City | Population | Air Quality Index | National Avg. |
| Granite Quarry, NC | 2,973 | 40 | 20.0% |
| Aquadale, NC | 413 | 40 | 20.0% |
| New London, NC | 640 | 40 | 20.0% |
| China Grove, NC | 4,225 | 40 | 20.0% |
| Landis, NC | 3,119 | 40 | 20.0% |
| Mount Pleasant, NC | 2,007 | 40 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| Minonk, IL | 2,007 | 44 | 12.0% |
| Devens, MA | 2,007 | 40 | 20.0% |
| Raymond, MS | 2,007 | 44 | 12.0% |
| North Warren, PA | 2,008 | 9 | 82.0% |
| Terrasse-Vaudreuil, QC | 2,008 | n/a | |
| Mount Pleasant, NC | 2,007 | 40 | 20.0% |
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