Altamahaw, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.7 °C (low) to 21.4 °C (high). Annual precipitation averages 1184.1 Millimeters. Altamahaw 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 Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.9 °C | 9.9 °C | 92.96 mm |
| February | -0.8 °C | 12 °C | 74.68 mm |
| March | 2.9 °C | 16.3 °C | 104.9 mm |
| April | 7.9 °C | 22 °C | 99.31 mm |
| May | 13 °C | 25.9 °C | 95.76 mm |
| June | 17.6 °C | 30.1 °C | 110.49 mm |
| July | 20 °C | 31.9 °C | 113.54 mm |
| August | 19.2 °C | 30.9 °C | 104.65 mm |
| September | 15.7 °C | 27.7 °C | 124.71 mm |
| October | 8.4 °C | 22.2 °C | 85.09 mm |
| November | 2.4 °C | 16.4 °C | 86.61 mm |
| December | -0.3 °C | 11.6 °C | 91.44 mm |
| Annual | 8.7 °C | 21.4 °C | 1184.14 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 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 | Exceptional Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |