Gregory, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 65.2 °F (low) to 79.7 °F (high). Annual precipitation averages 34 Inches. Gregory is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 48.6 °F | 65.4 °F | 1.86 in. |
| February | 52.8 °F | 68.6 °F | 1.68 in. |
| March | 58.9 °F | 73.5 °F | 2.42 in. |
| April | 65.0 °F | 79.1 °F | 1.87 in. |
| May | 72.2 °F | 84.7 °F | 3.31 in. |
| June | 77.0 °F | 89.3 °F | 3.52 in. |
| July | 78.3 °F | 90.5 °F | 2.83 in. |
| August | 78.1 °F | 91.9 °F | 2.8 in. |
| September | 74.6 °F | 88.9 °F | 5.62 in. |
| October | 67.9 °F | 83.0 °F | 3.7 in. |
| November | 58.2 °F | 74.4 °F | 2.36 in. |
| December | 50.6 °F | 67.6 °F | 2.0 in. |
| Annual | 65.2 °F | 79.7 °F | 33.97 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 10a : 30°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |