Pecan Grove, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 60.4 °F (low) to 79.6 °F (high). Annual precipitation averages 52.8 Inches. Pecan Grove is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 43.9 °F | 63.0 °F | 4.03 in. |
| February | 47.7 °F | 66.7 °F | 3.01 in. |
| March | 53.8 °F | 73.0 °F | 3.61 in. |
| April | 59.8 °F | 79.1 °F | 4.19 in. |
| May | 67.7 °F | 85.8 °F | 5.07 in. |
| June | 73.5 °F | 91.1 °F | 5.24 in. |
| July | 74.8 °F | 93.1 °F | 3.92 in. |
| August | 74.8 °F | 94.0 °F | 5.38 in. |
| September | 70.5 °F | 89.5 °F | 4.96 in. |
| October | 61.4 °F | 82.4 °F | 4.56 in. |
| November | 51.8 °F | 72.4 °F | 4.57 in. |
| December | 45.6 °F | 65.0 °F | 4.23 in. |
| Annual | 60.4 °F | 79.6 °F | 52.77 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |