| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 31°F | 52°F | 40°F | 5.3" |
| February | 32°F | 55°F | 42°F | 4.3" |
| March | 40°F | 64°F | 51°F | 3.9" |
| April | 48°F | 73°F | 60°F | 5.4" |
| May | 56°F | 79°F | 67°F | 5.5" |
| June | 65°F | 86°F | 75°F | 5.3" |
| July | 68°F | 89°F | 77°F | 5.2" |
| August | 67°F | 87°F | 76°F | 6.6" |
| September | 61°F | 82°F | 70°F | 4.3" |
| October | 48°F | 72°F | 59°F | 5.9" |
| November | 37°F | 62°F | 48°F | 9.4" |
| December | 34°F | 55°F | 44°F | 8.1" |
| Index | Cleveland | 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. |
| Faith, NC | 1,053 | 40 | 20.0% |
| Salisbury, NC | 33,961 | 40 | 20.0% |
| Cooleemee, NC | 1,028 | 40 | 20.0% |
| Granite Quarry, NC | 2,973 | 40 | 20.0% |
| Spencer, NC | 3,227 | 40 | 20.0% |
| Cleveland, NC | 1,147 | 40 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| King Cove, AK | 1,147 | 31 | 38.0% |
| Hawley, PA | 1,147 | 38 | 24.0% |
| Daniel, UT | 1,147 | 46 | 8.0% |
| Henry Fork, VA | 1,147 | 38 | 24.0% |
| Killen, AL | 1,146 | 37 | 26.0% |
| Cleveland, NC | 1,147 | 40 | 20.0% |
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