Gaffney, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.3 °C (low) to 22 °C (high). Annual precipitation averages 1221.5 Millimeters. Gaffney 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 | -1.1 °C | 11 °C | 105.16 mm |
| February | 0.3 °C | 13.3 °C | 89.41 mm |
| March | 3.8 °C | 17.6 °C | 118.36 mm |
| April | 8.4 °C | 22.6 °C | 103.63 mm |
| May | 13.4 °C | 26.5 °C | 92.96 mm |
| June | 18 °C | 30.1 °C | 108.97 mm |
| July | 20 °C | 32 °C | 103.89 mm |
| August | 19.4 °C | 31 °C | 115.57 mm |
| September | 16.1 °C | 28.2 °C | 98.55 mm |
| October | 9.2 °C | 22.8 °C | 85.09 mm |
| November | 3.2 °C | 16.9 °C | 90.68 mm |
| December | 0.4 °C | 12.4 °C | 109.22 mm |
| Annual | 9.3 °C | 22 °C | 1221.49 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 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 |