Richburg, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.4 °F (low) to 72.6 °F (high). Annual precipitation averages 44.5 Inches. Richburg 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 | 31.6 °F | 53.2 °F | 3.86 in. |
| February | 34.0 °F | 57.0 °F | 3.28 in. |
| March | 40.3 °F | 64.7 °F | 4.03 in. |
| April | 48.9 °F | 73.6 °F | 3.45 in. |
| May | 58.1 °F | 80.4 °F | 3.27 in. |
| June | 66.2 °F | 87.3 °F | 4.18 in. |
| July | 69.7 °F | 90.6 °F | 3.85 in. |
| August | 68.7 °F | 88.7 °F | 4.39 in. |
| September | 62.7 °F | 83.4 °F | 3.82 in. |
| October | 50.4 °F | 73.5 °F | 3.13 in. |
| November | 39.6 °F | 63.5 °F | 3.29 in. |
| December | 34.2 °F | 55.7 °F | 3.91 in. |
| Annual | 50.4 °F | 72.6 °F | 44.46 in. |
| 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 : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |