Richfield, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.2 °C (low) to 21.6 °C (high). Annual precipitation averages 1202.2 Millimeters. Richfield 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 | -1.5 °C | 10.7 °C | 93.73 mm |
| February | -0.1 °C | 12.8 °C | 76.96 mm |
| March | 3.4 °C | 16.9 °C | 104.65 mm |
| April | 8.4 °C | 22 °C | 98.81 mm |
| May | 13.6 °C | 25.9 °C | 87.63 mm |
| June | 18.3 °C | 29.8 °C | 117.6 mm |
| July | 20.3 °C | 31.6 °C | 119.63 mm |
| August | 19.6 °C | 30.7 °C | 118.87 mm |
| September | 16.1 °C | 27.6 °C | 116.84 mm |
| October | 9.1 °C | 22.4 °C | 87.63 mm |
| November | 3 °C | 16.8 °C | 87.63 mm |
| December | 0 °C | 12.3 °C | 92.2 mm |
| Annual | 9.2 °C | 21.6 °C | 1202.18 mm |
| 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 : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |