Walnut Creek, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.7 °C (low) to 22.7 °C (high). Annual precipitation averages 1285.2 Millimeters. Walnut Creek is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.3 °C | 12 °C | 86.61 mm |
| February | 1.2 °C | 13.9 °C | 77.98 mm |
| March | 4.7 °C | 17.9 °C | 95.5 mm |
| April | 9.9 °C | 23 °C | 88.14 mm |
| May | 14.9 °C | 26.9 °C | 99.57 mm |
| June | 19.6 °C | 30.8 °C | 120.65 mm |
| July | 21.7 °C | 32.4 °C | 141.99 mm |
| August | 20.7 °C | 31.2 °C | 146.3 mm |
| September | 17.6 °C | 28.5 °C | 163.58 mm |
| October | 10.8 °C | 23.6 °C | 90.93 mm |
| November | 5 °C | 18.1 °C | 84.33 mm |
| December | 2 °C | 13.7 °C | 89.66 mm |
| Annual | 10.7 °C | 22.7 °C | 1285.24 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |