| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 30°F | 53°F | 40°F | 6.8" |
| February | 32°F | 57°F | 43°F | 4.7" |
| March | 39°F | 65°F | 51°F | 3.6" |
| April | 48°F | 74°F | 60°F | 7.9" |
| May | 55°F | 80°F | 67°F | 6.7" |
| June | 64°F | 88°F | 75°F | 3.6" |
| July | 68°F | 90°F | 78°F | 6.3" |
| August | 67°F | 88°F | 76°F | 6.8" |
| September | 61°F | 83°F | 70°F | 7.9" |
| October | 47°F | 73°F | 59°F | 7.6" |
| November | 36°F | 63°F | 48°F | 8.6" |
| December | 34°F | 56°F | 44°F | 8.6" |
| Index | Cornelius | North Carolina | National |
| Air quality index | 49 | 35 | 42 |
| Pollution index | 13,834,800 | 2,789,538 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 200 |
| Days with moderate air quality | 147 |
| Days w/ poor A.Q. for sensitive groups | 18 |
| Days with unhealthy air quality | 0 |
| 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. |
| Denver, NC | 2,964 | 36 | 28.0% |
| Westport, NC | 4,153 | 36 | 28.0% |
| Ranlo, NC | 3,643 | 36 | 28.0% |
| Stanley, NC | 3,734 | 36 | 28.0% |
| Lake Norman of Catawba, NC | 8,701 | 36 | 28.0% |
| Cornelius, NC | 29,836 | 49 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Oceanside, NY | 29,850 | 51 | 2.0% |
| Greenville, MS | 29,854 | 43 | 14.0% |
| Texarkana, AR | 29,864 | 39 | 22.0% |
| Chamblee, GA | 29,874 | 52 | 4.0% |
| Morristown, TN | 29,887 | 44 | 12.0% |
| Cornelius, NC | 29,836 | 49 | 2.0% |
Here are the best places to live in North Carolina
These are the 10 cheapest cities in North Carolina
Most Dangerous States In The US
Check out the 10 safest cities in North Carolina