Mount Croghan, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.8 °F (low) to 73.4 °F (high). Annual precipitation averages 46.9 Inches. Mount Croghan 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 | 32.1 °F | 53.9 °F | 3.85 in. |
| February | 34.3 °F | 57.5 °F | 3.25 in. |
| March | 40.8 °F | 65.2 °F | 3.87 in. |
| April | 49.6 °F | 74.6 °F | 3.47 in. |
| May | 58.4 °F | 81.5 °F | 3.33 in. |
| June | 66.4 °F | 88.2 °F | 4.35 in. |
| July | 70.1 °F | 91.2 °F | 4.73 in. |
| August | 68.8 °F | 89.4 °F | 4.73 in. |
| September | 62.9 °F | 84.0 °F | 4.6 in. |
| October | 50.8 °F | 74.7 °F | 3.57 in. |
| November | 40.3 °F | 64.5 °F | 3.33 in. |
| December | 35.0 °F | 56.6 °F | 3.84 in. |
| Annual | 50.8 °F | 73.4 °F | 46.92 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 | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |