Troy, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.6 °C (low) to 21.9 °C (high). Annual precipitation averages 1196.1 Millimeters. Troy 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 | -0.9 °C | 10.9 °C | 95.25 mm |
| February | 0.3 °C | 12.9 °C | 78.74 mm |
| March | 3.9 °C | 17.3 °C | 102.36 mm |
| April | 8.8 °C | 22.6 °C | 92.71 mm |
| May | 13.9 °C | 26.3 °C | 86.61 mm |
| June | 18.4 °C | 30.3 °C | 113.03 mm |
| July | 20.6 °C | 32.1 °C | 120.14 mm |
| August | 19.8 °C | 31.1 °C | 115.32 mm |
| September | 16.4 °C | 27.8 °C | 122.43 mm |
| October | 9.7 °C | 22.3 °C | 89.92 mm |
| November | 3.7 °C | 16.8 °C | 87.12 mm |
| December | 0.8 °C | 12.3 °C | 92.46 mm |
| Annual | 9.6 °C | 21.9 °C | 1196.09 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 |