| 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. 11 - Apr. 20 |
| 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 29303 - Spartanburg, SC | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 30 | 32 | 39 | 46 | 55 | 63 | 67 | 66 | 60 | 48 | 39 | 32 | 48 |
| Avg Max Temp (°F) | 52 | 57 | 65 | 74 | 81 | 87 | 90 | 88 | 83 | 74 | 63 | 55 | 72 |
| Avg Precip (In.) | 4.65 | 4.15 | 5.31 | 3.62 | 4.63 | 4.1 | 4.15 | 3.99 | 3.77 | 4.01 | 3.76 | 4.04 | 50.19 |