Spencer Mountain, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.9 °C (low) to 22.1 °C (high). Annual precipitation averages 1111 Millimeters. Spencer Mountain is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.8 °C | 11.2 °C | 91.44 mm |
| February | 0.7 °C | 13.3 °C | 78.99 mm |
| March | 4.3 °C | 17.4 °C | 97.28 mm |
| April | 9.2 °C | 22.5 °C | 90.17 mm |
| May | 14.2 °C | 26.4 °C | 92.96 mm |
| June | 18.7 °C | 30.3 °C | 107.19 mm |
| July | 20.7 °C | 32.1 °C | 94.23 mm |
| August | 20.1 °C | 31.2 °C | 109.22 mm |
| September | 16.8 °C | 28.3 °C | 99.57 mm |
| October | 9.9 °C | 22.9 °C | 81.53 mm |
| November | 3.8 °C | 17.1 °C | 75.95 mm |
| December | 0.7 °C | 12.6 °C | 92.46 mm |
| Annual | 9.9 °C | 22.1 °C | 1110.99 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |