| 2023 Hardiness Zone: | Zone 8a: 10°F to 15°F |
| 2012 Hardiness Zone: | Zone 7b: 5°F to 10°F |
| 1990 Hardiness Zone: | Zone 7b: 5F to 10F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 45b - Southern Outer Piedmont |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 29306 - Spartanburg, SC | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 30 | 33 | 39 | 46 | 55 | 64 | 68 | 67 | 61 | 48 | 39 | 33 | 49 |
| Avg Max Temp (°F) | 52 | 57 | 65 | 74 | 81 | 87 | 90 | 89 | 83 | 74 | 64 | 55 | 72 |
| Avg Precip (In.) | 4.62 | 4.09 | 5.17 | 3.51 | 4.4 | 4.08 | 4.06 | 3.96 | 3.73 | 3.95 | 3.69 | 3.98 | 49.23 |