Groveton, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.1 °C (low) to 25.8 °C (high). Annual precipitation averages 1296.4 Millimeters. Groveton is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.3 °C | 15.8 °C | 115.32 mm |
| February | 5.2 °C | 17.9 °C | 95.76 mm |
| March | 8.7 °C | 21.7 °C | 103.38 mm |
| April | 12.4 °C | 25.6 °C | 96.52 mm |
| May | 17.4 °C | 29.4 °C | 121.67 mm |
| June | 21.1 °C | 32.8 °C | 127 mm |
| July | 22.4 °C | 34.6 °C | 85.85 mm |
| August | 22.1 °C | 35.1 °C | 99.82 mm |
| September | 19 °C | 32.1 °C | 96.01 mm |
| October | 13.2 °C | 27.2 °C | 118.11 mm |
| November | 7.7 °C | 21 °C | 114.55 mm |
| December | 4.2 °C | 16.6 °C | 122.43 mm |
| Annual | 13.1 °C | 25.8 °C | 1296.42 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |