Dillon, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 51.6 °F (low) to 73.8 °F (high). Annual precipitation averages 48.7 Inches. Dillon is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 33.2 °F | 55.1 °F | 3.56 in. |
| February | 35.3 °F | 58.5 °F | 3.34 in. |
| March | 41.3 °F | 66.1 °F | 3.46 in. |
| April | 49.8 °F | 74.8 °F | 3.55 in. |
| May | 58.8 °F | 81.7 °F | 3.84 in. |
| June | 67.5 °F | 87.9 °F | 4.72 in. |
| July | 71.0 °F | 90.7 °F | 5.07 in. |
| August | 69.5 °F | 88.9 °F | 5.53 in. |
| September | 63.8 °F | 83.8 °F | 5.2 in. |
| October | 51.6 °F | 75.1 °F | 3.66 in. |
| November | 41.1 °F | 65.5 °F | 3.18 in. |
| December | 36.0 °F | 57.8 °F | 3.59 in. |
| Annual | 51.6 °F | 73.8 °F | 48.7 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |