| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 29°F | 51°F | 38°F | 10.2" |
| February | 30°F | 53°F | 40°F | 5.8" |
| March | 38°F | 64°F | 49°F | 5.1" |
| April | 45°F | 73°F | 58°F | 7.5" |
| May | 53°F | 79°F | 65°F | 4.8" |
| June | 61°F | 85°F | 72°F | 8.0" |
| July | 64°F | 85°F | 73°F | 8.3" |
| August | 63°F | 85°F | 73°F | 7.8" |
| September | 57°F | 81°F | 67°F | 6.9" |
| October | 45°F | 72°F | 56°F | 9.0" |
| November | 35°F | 62°F | 47°F | 11.7" |
| December | 33°F | 55°F | 42°F | 12.6" |
| Index | Lake Santeetlah | North Carolina | National |
| Air quality index | 44 | 35 | 42 |
| Pollution index | 671,788 | 2,789,538 | 2,726,193 |
| Measurement | Total |
| Days measured | 364 |
| Days with good air quality | 287 |
| Days with moderate air quality | 77 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| 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. |
| Marble, NC | 546 | 30 | 40.0% |
| Andrews, NC | 1,915 | 30 | 40.0% |
| Robbinsville, NC | 854 | 44 | 12.0% |
| Fontana Dam, NC | 34 | 44 | 12.0% |
| Lake Santeetlah, NC | 40 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Eagle Village, AK | 40 | 38 | 24.0% |
| Edna Bay, AK | 40 | 20 | 60.0% |
| Levelock, AK | 40 | 31 | 38.0% |
| Egypt, AR | 40 | 45 | 10.0% |
| California Hot Springs, CA | 40 | 67 | 34.0% |
| Lake Santeetlah, NC | 40 | 44 | 12.0% |
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