Eureka Mill, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.7 °C (low) to 22.6 °C (high). Annual precipitation averages 1155.5 Millimeters. Eureka Mill is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.7 °C | 11.8 °C | 102.36 mm |
| February | 0.7 °C | 13.9 °C | 85.34 mm |
| March | 4.1 °C | 18.2 °C | 105.16 mm |
| April | 8.7 °C | 23.3 °C | 95 mm |
| May | 13.9 °C | 27.1 °C | 85.6 mm |
| June | 18.6 °C | 30.8 °C | 109.22 mm |
| July | 20.6 °C | 32.6 °C | 102.87 mm |
| August | 20.1 °C | 31.6 °C | 109.98 mm |
| September | 16.6 °C | 28.6 °C | 97.28 mm |
| October | 9.7 °C | 23.1 °C | 75.95 mm |
| November | 3.6 °C | 17.5 °C | 85.34 mm |
| December | 0.7 °C | 13.1 °C | 101.35 mm |
| Annual | 9.7 °C | 22.6 °C | 1155.45 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |