| 2023 Hardiness Zone: | Zone 8a: 10°F to 15°F |
| 2012 Hardiness Zone: | Zone 7b: 5°F to 10°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: | 45g - Triassic Basins |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 27517 - Chapel Hill, NC | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 27 | 29 | 37 | 45 | 54 | 62 | 66 | 65 | 58 | 45 | 37 | 30 | 46 |
| Avg Max Temp (°F) | 50 | 54 | 62 | 72 | 79 | 85 | 89 | 87 | 82 | 72 | 63 | 53 | 71 |
| Avg Precip (In.) | 4.33 | 3.58 | 4.44 | 3.24 | 4.38 | 3.96 | 4.09 | 4.33 | 4.38 | 3.63 | 3.5 | 3.25 | 47.12 |