Orange Grove, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 16.4 °C (low) to 28.4 °C (high). Annual precipitation averages 718.8 Millimeters. Orange Grove is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 7.2 °C | 19.7 °C | 36.07 mm |
| February | 9.6 °C | 22.1 °C | 33.53 mm |
| March | 13.1 °C | 25.2 °C | 55.12 mm |
| April | 16.4 °C | 28.4 °C | 46.99 mm |
| May | 20.6 °C | 31.3 °C | 78.74 mm |
| June | 23.1 °C | 34.2 °C | 83.82 mm |
| July | 23.6 °C | 35.2 °C | 78.23 mm |
| August | 23.7 °C | 36 °C | 60.2 mm |
| September | 21.8 °C | 33.1 °C | 106.17 mm |
| October | 17.3 °C | 29.7 °C | 57.4 mm |
| November | 12.1 °C | 24.7 °C | 37.59 mm |
| December | 8.4 °C | 20.6 °C | 44.96 mm |
| Annual | 16.4 °C | 28.4 °C | 718.82 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |