| 2023 Hardiness Zone: | Zone 8a: 10°F to 15°F Zone 7b: 5°F to 10°F | |
| 2012 Hardiness Zone: | Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F | |
| 1990 Hardiness Zone: | Zone 7a: 0F to 5F | |
| Average First Frost Date: | Nov. 1 - Nov. 10 | |
| Average Last Frost Date: | Apr. 1 - Apr. 10 | |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate | |
| Ecoregion: | 45a - Southern Inner Piedmont | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 28756 - Mill Spring, NC | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 30 | 32 | 38 | 45 | 54 | 62 | 67 | 65 | 59 | 47 | 39 | 32 | 48 |
| Avg Max Temp (°F) | 52 | 56 | 65 | 73 | 80 | 86 | 89 | 87 | 82 | 73 | 63 | 54 | 72 |
| Avg Precip (In.) | 5.3 | 4.86 | 6.23 | 4.45 | 5.49 | 5.2 | 4.86 | 5.34 | 4.98 | 4.57 | 4.68 | 4.59 | 60.55 |