Siler City, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 48.3 °F (low) to 70.1 °F (high). Annual precipitation averages 46.5 Inches. Siler City 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 | 29.2 °F | 50.2 °F | 3.76 in. |
| February | 31.5 °F | 53.6 °F | 3.07 in. |
| March | 38.1 °F | 61.5 °F | 4.28 in. |
| April | 46.9 °F | 71.1 °F | 3.67 in. |
| May | 55.9 °F | 77.9 °F | 3.6 in. |
| June | 64.3 °F | 85.2 °F | 4.13 in. |
| July | 68.5 °F | 88.6 °F | 4.27 in. |
| August | 66.9 °F | 86.7 °F | 4.13 in. |
| September | 60.9 °F | 81.0 °F | 5.14 in. |
| October | 48.1 °F | 71.4 °F | 3.48 in. |
| November | 37.5 °F | 61.4 °F | 3.46 in. |
| December | 32.1 °F | 53.1 °F | 3.48 in. |
| Annual | 48.3 °F | 70.1 °F | 46.47 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 7b : 5°F to 10°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |