| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 26°F | 43°F | 33°F | 3.8" |
| February | 27°F | 45°F | 35°F | 5.8" |
| March | 34°F | 55°F | 43°F | 4.2" |
| April | 42°F | 64°F | 53°F | 6.4" |
| May | 50°F | 71°F | 60°F | 8.2" |
| June | 58°F | 79°F | 67°F | 6.2" |
| July | 61°F | 80°F | 69°F | 10.7" |
| August | 60°F | 79°F | 68°F | 7.9" |
| September | 53°F | 74°F | 62°F | 10.3" |
| October | 43°F | 64°F | 53°F | 14.7" |
| November | 33°F | 54°F | 43°F | 9.4" |
| December | 30°F | 48°F | 38°F | 7.6" |
| Index | Boone | North Carolina | National |
| Air quality index | 26 | 35 | 42 |
| Pollution index | 457,681 | 2,789,538 | 2,726,193 |
| Measurement | Total |
| Days measured | 122 |
| Days with good air quality | 109 |
| Days with moderate air quality | 12 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality | 1 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Grandfather, NC | 60 | 26 | 48.0% |
| Beech Mountain, NC | 766 | 26 | 48.0% |
| Cove Creek, NC | 1,087 | 26 | 48.0% |
| Newland, NC | 710 | 26 | 48.0% |
| Foscoe, NC | 1,309 | 26 | 48.0% |
| Boone, NC | 19,466 | 26 | 48.0% |
| City | Population | Air Quality Index | National Avg. |
| Orinda, CA | 19,461 | 40 | 20.0% |
| Stillwater, MN | 19,471 | 46 | 8.0% |
| Franconia, VA | 19,478 | 47 | 6.0% |
| Lynbrook, NY | 19,445 | 51 | 2.0% |
| Riverview, NB | 19,441 | n/a | |
| Boone, NC | 19,466 | 26 | 48.0% |
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