Shelby, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.9 °C (low) to 21.7 °C (high). Annual precipitation averages 1267.7 Millimeters. Shelby is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.6 °C | 10.7 °C | 108.71 mm |
| February | -0.2 °C | 12.9 °C | 88.39 mm |
| March | 3.4 °C | 17.1 °C | 114.81 mm |
| April | 8.1 °C | 22.1 °C | 110.74 mm |
| May | 13.2 °C | 26.1 °C | 110.24 mm |
| June | 17.7 °C | 29.8 °C | 108.46 mm |
| July | 19.8 °C | 31.7 °C | 108.97 mm |
| August | 19.2 °C | 30.7 °C | 117.09 mm |
| September | 15.8 °C | 27.8 °C | 98.04 mm |
| October | 8.8 °C | 22.5 °C | 93.98 mm |
| November | 2.7 °C | 16.7 °C | 98.81 mm |
| December | -0.1 °C | 12.1 °C | 109.47 mm |
| Annual | 8.9 °C | 21.7 °C | 1267.71 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 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 |