Troy, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 55.6 °F (low) to 78.2 °F (high). Annual precipitation averages 37.7 Inches. Troy is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 36.5 °F | 59.3 °F | 2.75 in. |
| February | 40.2 °F | 63.2 °F | 2.6 in. |
| March | 47.5 °F | 70.0 °F | 3.34 in. |
| April | 54.8 °F | 77.6 °F | 2.84 in. |
| May | 63.7 °F | 84.7 °F | 4.47 in. |
| June | 70.6 °F | 91.6 °F | 3.59 in. |
| July | 73.1 °F | 95.3 °F | 1.84 in. |
| August | 73.0 °F | 96.2 °F | 3.13 in. |
| September | 66.8 °F | 89.8 °F | 3.25 in. |
| October | 56.5 °F | 80.4 °F | 3.72 in. |
| November | 46.4 °F | 69.1 °F | 3.07 in. |
| December | 38.4 °F | 60.8 °F | 3.05 in. |
| Annual | 55.6 °F | 78.2 °F | 37.65 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |