Richlands, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.4 °C (low) to 23 °C (high). Annual precipitation averages 1440.9 Millimeters. Richlands 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. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.2 °C | 12.9 °C | 98.81 mm |
| February | 1 °C | 14.6 °C | 85.85 mm |
| March | 4.3 °C | 18.4 °C | 96.27 mm |
| April | 9.2 °C | 23.2 °C | 81.03 mm |
| May | 14.3 °C | 27.1 °C | 117.35 mm |
| June | 18.9 °C | 30.5 °C | 141.22 mm |
| July | 21.2 °C | 32.4 °C | 166.37 mm |
| August | 20.3 °C | 31.2 °C | 194.56 mm |
| September | 17.4 °C | 28.5 °C | 181.36 mm |
| October | 10.8 °C | 23.8 °C | 98.04 mm |
| November | 4.8 °C | 18.7 °C | 88.39 mm |
| December | 1.8 °C | 14.5 °C | 91.69 mm |
| Annual | 10.4 °C | 23 °C | 1440.94 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |