Myrtle Grove, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.2 °C (low) to 22.8 °C (high). Annual precipitation averages 1655.8 Millimeters. Myrtle Grove is located in USDA Plant Hardiness Zone 8b. 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 | 3.2 °C | 13.4 °C | 106.68 mm |
| February | 3.9 °C | 14.8 °C | 93.73 mm |
| March | 7.1 °C | 18.2 °C | 102.11 mm |
| April | 12.2 °C | 22.6 °C | 101.35 mm |
| May | 17.1 °C | 26.3 °C | 97.03 mm |
| June | 21.6 °C | 29.7 °C | 135.89 mm |
| July | 23.3 °C | 31.3 °C | 208.79 mm |
| August | 22.5 °C | 30.8 °C | 214.88 mm |
| September | 20 °C | 28.3 °C | 241.3 mm |
| October | 14.2 °C | 24.1 °C | 138.68 mm |
| November | 8.7 °C | 19.1 °C | 104.65 mm |
| December | 4.8 °C | 15.2 °C | 110.74 mm |
| Annual | 13.2 °C | 22.8 °C | 1655.83 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |