Glenville, North Carolina has a Temperate Oceanic Climate climate (Köppen classification: Cfb). Average annual temperatures range from 6.4 °C (low) to 17.3 °C (high). Annual precipitation averages 1676.4 Millimeters. Glenville is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.5 °C | 6.8 °C | 157.73 mm |
| February | -2 °C | 8.8 °C | 138.18 mm |
| March | 1 °C | 12.6 °C | 137.67 mm |
| April | 5.6 °C | 17.7 °C | 139.19 mm |
| May | 10.2 °C | 21.4 °C | 135.38 mm |
| June | 14.1 °C | 24.7 °C | 143 mm |
| July | 16 °C | 26.3 °C | 124.71 mm |
| August | 15.5 °C | 25.7 °C | 140.46 mm |
| September | 12.6 °C | 23.1 °C | 139.19 mm |
| October | 6.7 °C | 18.4 °C | 120.65 mm |
| November | 1.6 °C | 13 °C | 138.18 mm |
| December | -1.2 °C | 8.7 °C | 162.05 mm |
| Annual | 6.4 °C | 17.3 °C | 1676.39 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfb - Temperate Oceanic Climate |