Windsor, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 52 °F (low) to 75.7 °F (high). Annual precipitation averages 48.5 Inches. Windsor is located in USDA Plant Hardiness Zone 8b. 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 | 34.2 °F | 57.3 °F | 4.21 in. |
| February | 36.8 °F | 61.1 °F | 3.78 in. |
| March | 42.9 °F | 68.5 °F | 4.23 in. |
| April | 50.5 °F | 76.6 °F | 3.23 in. |
| May | 59.6 °F | 83.8 °F | 3.38 in. |
| June | 67.3 °F | 89.7 °F | 5.3 in. |
| July | 70.1 °F | 92.3 °F | 4.79 in. |
| August | 69.3 °F | 90.4 °F | 5.1 in. |
| September | 63.6 °F | 85.7 °F | 4.03 in. |
| October | 52.4 °F | 76.8 °F | 3.2 in. |
| November | 41.4 °F | 66.9 °F | 3.15 in. |
| December | 35.7 °F | 59.3 °F | 4.06 in. |
| Annual | 52 °F | 75.7 °F | 48.46 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 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |