Erwin, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.2 °C (low) to 22.5 °C (high). Annual precipitation averages 1248.9 Millimeters. Erwin 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 | -0.6 °C | 11.6 °C | 90.93 mm |
| February | 0.6 °C | 13.7 °C | 78.23 mm |
| March | 4.2 °C | 17.8 °C | 97.03 mm |
| April | 9.2 °C | 22.9 °C | 89.15 mm |
| May | 14.5 °C | 26.8 °C | 96.01 mm |
| June | 19.2 °C | 30.6 °C | 120.9 mm |
| July | 21.5 °C | 32.3 °C | 143.76 mm |
| August | 20.6 °C | 31.3 °C | 139.7 mm |
| September | 17.3 °C | 28.4 °C | 136.14 mm |
| October | 10.2 °C | 23.1 °C | 87.38 mm |
| November | 4.1 °C | 17.7 °C | 85.34 mm |
| December | 1.1 °C | 13.3 °C | 84.33 mm |
| Annual | 10.2 °C | 22.5 °C | 1248.9 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 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |