| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 30°F | 51°F | 40°F | 6.4" |
| February | 31°F | 55°F | 42°F | 3.6" |
| March | 39°F | 64°F | 51°F | 4.8" |
| April | 47°F | 73°F | 59°F | 7.7" |
| May | 55°F | 79°F | 66°F | 8.6" |
| June | 64°F | 86°F | 74°F | 5.4" |
| July | 67°F | 88°F | 76°F | 7.5" |
| August | 67°F | 87°F | 75°F | 7.7" |
| September | 60°F | 81°F | 69°F | 5.5" |
| October | 48°F | 71°F | 59°F | 7.1" |
| November | 38°F | 61°F | 49°F | 9.1" |
| December | 34°F | 54°F | 43°F | 7.5" |
| Index | Statesville | North Carolina | National |
| Air quality index | 40 | 35 | 42 |
| Pollution index | 3,428,900 | 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 | 0.005% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.010% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Lake Norman of Catawba, NC | 8,701 | 36 | 28.0% |
| Troutman, NC | 2,723 | 40 | 20.0% |
| Cleveland, NC | 1,147 | 40 | 20.0% |
| Mooresville, NC | 38,498 | 40 | 20.0% |
| Harmony, NC | 525 | 40 | 20.0% |
| Statesville, NC | 27,114 | 40 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| Wilmette, IL | 27,114 | 55 | 10.0% |
| Maywood, CA | 27,127 | 72 | 44.0% |
| Plum, PA | 27,137 | 56 | 12.0% |
| Allen Park, MI | 27,089 | 56 | 12.0% |
| Lincoln, ON | 27,082 | n/a | |
| Statesville, NC | 27,114 | 40 | 20.0% |
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