Inman Mills, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.1 °C (low) to 22 °C (high). Annual precipitation averages 1366.3 Millimeters. Inman Mills is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.1 °C | 11.1 °C | 114.55 mm |
| February | 1.2 °C | 13.3 °C | 101.6 mm |
| March | 4.9 °C | 17.4 °C | 120.65 mm |
| April | 9.3 °C | 22.5 °C | 115.82 mm |
| May | 14.1 °C | 26.4 °C | 106.17 mm |
| June | 18.4 °C | 30.1 °C | 120.4 mm |
| July | 20.4 °C | 32.1 °C | 120.4 mm |
| August | 19.8 °C | 31 °C | 126.24 mm |
| September | 16.7 °C | 28 °C | 112.01 mm |
| October | 10.3 °C | 22.7 °C | 100.08 mm |
| November | 4.4 °C | 16.9 °C | 104.9 mm |
| December | 1.4 °C | 12.3 °C | 123.44 mm |
| Annual | 10.1 °C | 22 °C | 1366.26 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| 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 |