Alliance, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.4 °C (low) to 22.9 °C (high). Annual precipitation averages 1451.1 Millimeters. Alliance 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 | 1.4 °C | 12.9 °C | 100.33 mm |
| February | 2.3 °C | 14.5 °C | 87.38 mm |
| March | 5.4 °C | 18.1 °C | 93.47 mm |
| April | 10.3 °C | 23.2 °C | 87.38 mm |
| May | 15.2 °C | 26.8 °C | 111.51 mm |
| June | 19.7 °C | 30.4 °C | 136.65 mm |
| July | 21.8 °C | 31.9 °C | 170.69 mm |
| August | 21.1 °C | 31 °C | 188.98 mm |
| September | 18.4 °C | 28.6 °C | 177.55 mm |
| October | 12.2 °C | 23.9 °C | 104.9 mm |
| November | 6.3 °C | 18.7 °C | 96.01 mm |
| December | 3 °C | 14.6 °C | 96.27 mm |
| Annual | 11.4 °C | 22.9 °C | 1451.12 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |