Aynor, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 52.2 °F (low) to 73.9 °F (high). Annual precipitation averages 52.3 Inches. Aynor is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 34.2 °F | 56.3 °F | 3.6 in. |
| February | 36.3 °F | 59.5 °F | 3.43 in. |
| March | 41.9 °F | 66.6 °F | 3.69 in. |
| April | 50.4 °F | 75.0 °F | 3.41 in. |
| May | 59.2 °F | 81.6 °F | 3.95 in. |
| June | 67.5 °F | 87.3 °F | 5.17 in. |
| July | 71.1 °F | 89.0 °F | 5.62 in. |
| August | 69.9 °F | 89.0 °F | 6.38 in. |
| September | 64.2 °F | 82.0 °F | 6.28 in. |
| October | 52.7 °F | 75.5 °F | 3.79 in. |
| November | 42.1 °F | 66.2 °F | 3.26 in. |
| December | 36.9 °F | 58.8 °F | 3.71 in. |
| Annual | 52.2 °F | 73.9 °F | 52.29 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 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 |