Iva, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.3 °C (low) to 22.7 °C (high). Annual precipitation averages 1248.7 Millimeters. Iva 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. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0 °C | 12 °C | 107.19 mm |
| February | 1.4 °C | 14.1 °C | 107.7 mm |
| March | 4.8 °C | 18.3 °C | 116.59 mm |
| April | 9.3 °C | 23 °C | 89.41 mm |
| May | 14.3 °C | 26.9 °C | 87.38 mm |
| June | 18.9 °C | 30.7 °C | 113.28 mm |
| July | 20.9 °C | 32.6 °C | 103.38 mm |
| August | 20.4 °C | 31.5 °C | 108.71 mm |
| September | 17.2 °C | 28.6 °C | 97.54 mm |
| October | 10.4 °C | 23.2 °C | 91.44 mm |
| November | 4.3 °C | 17.7 °C | 104.65 mm |
| December | 1.4 °C | 13.2 °C | 121.41 mm |
| Annual | 10.3 °C | 22.7 °C | 1248.68 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| 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 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |