Glenwood, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.9 °C (low) to 21.2 °C (high). Annual precipitation averages 1422.9 Millimeters. Glenwood is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.3 °C | 10.2 °C | 118.36 mm |
| February | -1.2 °C | 12.4 °C | 96.77 mm |
| March | 2.5 °C | 16.6 °C | 115.82 mm |
| April | 6.9 °C | 21.9 °C | 127.51 mm |
| May | 12.1 °C | 25.8 °C | 125.22 mm |
| June | 16.4 °C | 29.3 °C | 128.52 mm |
| July | 18.5 °C | 31.1 °C | 126.49 mm |
| August | 17.9 °C | 30.1 °C | 130.56 mm |
| September | 14.6 °C | 27.1 °C | 121.67 mm |
| October | 8 °C | 22.1 °C | 104.39 mm |
| November | 1.9 °C | 16.4 °C | 104.14 mm |
| December | -1 °C | 11.7 °C | 123.44 mm |
| Annual | 7.9 °C | 21.2 °C | 1422.89 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |