Marion, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 52.2 °F (low) to 74.3 °F (high). Annual precipitation averages 50 Inches. Marion 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. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 34.1 °F | 56.2 °F | 3.44 in. |
| February | 36.3 °F | 59.6 °F | 3.37 in. |
| March | 41.9 °F | 66.7 °F | 3.53 in. |
| April | 50.4 °F | 75.4 °F | 3.35 in. |
| May | 59.3 °F | 81.8 °F | 3.99 in. |
| June | 67.6 °F | 87.8 °F | 5.02 in. |
| July | 71.1 °F | 90.4 °F | 5.23 in. |
| August | 69.8 °F | 88.9 °F | 5.9 in. |
| September | 64.3 °F | 83.7 °F | 5.88 in. |
| October | 52.3 °F | 75.6 °F | 3.34 in. |
| November | 42.0 °F | 66.2 °F | 3.17 in. |
| December | 36.8 °F | 58.8 °F | 3.75 in. |
| Annual | 52.2 °F | 74.3 °F | 49.97 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| 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 |