Spartanburg, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.9 °C (low) to 22.5 °C (high). Annual precipitation averages 1276.6 Millimeters. Spartanburg is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.2 °C | 11.6 °C | 110.49 mm |
| February | 1 °C | 13.8 °C | 97.28 mm |
| March | 4.6 °C | 18 °C | 120.4 mm |
| April | 8.9 °C | 23.1 °C | 109.47 mm |
| May | 13.8 °C | 27.1 °C | 91.95 mm |
| June | 18.3 °C | 30.6 °C | 114.3 mm |
| July | 20.4 °C | 32.6 °C | 99.06 mm |
| August | 19.8 °C | 31.4 °C | 117.6 mm |
| September | 16.6 °C | 28.4 °C | 105.41 mm |
| October | 9.8 °C | 23.2 °C | 98.3 mm |
| November | 4 °C | 17.3 °C | 96.27 mm |
| December | 1.2 °C | 12.8 °C | 116.08 mm |
| Annual | 9.9 °C | 22.5 °C | 1276.61 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |