Marshallberg, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 14.1 °C (low) to 21.4 °C (high). Annual precipitation averages 1591.1 Millimeters. Marshallberg is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.7 °C | 12.4 °C | 116.84 mm |
| February | 4.6 °C | 13.2 °C | 106.43 mm |
| March | 7.8 °C | 16.5 °C | 98.04 mm |
| April | 12.8 °C | 20.4 °C | 104.9 mm |
| May | 17.6 °C | 24.4 °C | 111.76 mm |
| June | 22 °C | 28.1 °C | 114.55 mm |
| July | 24 °C | 29.8 °C | 160.02 mm |
| August | 23.4 °C | 29.4 °C | 204.22 mm |
| September | 21.2 °C | 27.4 °C | 213.61 mm |
| October | 15.8 °C | 23.2 °C | 127.25 mm |
| November | 10 °C | 18.2 °C | 120.65 mm |
| December | 6.2 °C | 14.3 °C | 112.78 mm |
| Annual | 14.1 °C | 21.4 °C | 1591.05 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |