| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 11 - Apr. 20 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 66j - Broad Basins |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 28778 - Swannanoa, NC | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 24 | 26 | 33 | 40 | 49 | 57 | 61 | 60 | 54 | 42 | 33 | 27 | 42 |
| Avg Max Temp (°F) | 47 | 50 | 58 | 67 | 74 | 80 | 83 | 82 | 76 | 68 | 59 | 50 | 66 |
| Avg Precip (In.) | 3.58 | 3.23 | 4.43 | 3.44 | 4.31 | 3.86 | 3.64 | 3.63 | 3.55 | 3.06 | 3.49 | 3 | 43.21 |