| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 26°F | 51°F | 37°F | 4.0" |
| February | 28°F | 54°F | 39°F | 2.8" |
| March | 35°F | 62°F | 48°F | 3.6" |
| April | 43°F | 72°F | 57°F | 4.3" |
| May | 51°F | 77°F | 64°F | 3.9" |
| June | 60°F | 84°F | 71°F | 4.7" |
| July | 63°F | 85°F | 73°F | 5.3" |
| August | 63°F | 85°F | 73°F | 5.0" |
| September | 57°F | 80°F | 67°F | 4.6" |
| October | 44°F | 71°F | 56°F | 4.0" |
| November | 34°F | 61°F | 46°F | 3.6" |
| December | 31°F | 54°F | 41°F | 5.3" |
| Index | Swannanoa | North Carolina | National |
| Air quality index | 44 | 35 | 42 |
| Pollution index | 3,495,600 | 2,789,538 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 285 |
| Days with moderate air quality | 78 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.080% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.060% |
| Mercury | 0.040% |
| City | Population | Air Quality Index | National Avg. |
| Fruitland, NC | 2,216 | 44 | 12.0% |
| Asheville, NC | 92,328 | 44 | 12.0% |
| Black Mountain, NC | 8,177 | 44 | 12.0% |
| Royal Pines, NC | 4,499 | 44 | 12.0% |
| Chimney Rock Village, NC | 174 | 44 | 12.0% |
| Swannanoa, NC | 4,360 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Nashville, AR | 4,359 | 39 | 22.0% |
| Rockmart, GA | 4,359 | 44 | 12.0% |
| Château-Richer, QC | 4,359 | n/a | |
| Captain Cook, HI | 4,361 | 16 | 68.0% |
| Holt, AL | 4,358 | 35 | 30.0% |
| Swannanoa, NC | 4,360 | 44 | 12.0% |
Here are the best places to live in North Carolina
Most Dangerous States In The US
Check out the 10 safest cities in North Carolina
Most Dangerous Cities In The US