| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F | |
| 2012 Hardiness Zone: | Zone 8a: 10°F to 15°F | |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F | |
| Average First Frost Date: | Nov. 11 - Nov. 20 | |
| Average Last Frost Date: | Mar. 21 - Mar. 31 | |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate | |
| Ecoregion: | 65l - Vidalia Upland | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 29154 - Sumter, SC | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 34 | 36 | 43 | 50 | 58 | 66 | 70 | 68 | 63 | 51 | 42 | 36 | 51 |
| Avg Max Temp (°F) | 56 | 61 | 69 | 77 | 84 | 89 | 92 | 91 | 86 | 77 | 68 | 60 | 76 |
| Avg Precip (In.) | 4.61 | 3.53 | 4.34 | 2.94 | 3.43 | 5.21 | 5.26 | 5.11 | 4.13 | 3.02 | 2.85 | 3.48 | 47.92 |