Wells Branch, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.3 °C (low) to 25.8 °C (high). Annual precipitation averages 945.9 Millimeters. Wells Branch 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. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.3 °C | 15.9 °C | 66.8 mm |
| February | 5.1 °C | 17.8 °C | 53.34 mm |
| March | 8.9 °C | 21.8 °C | 76.45 mm |
| April | 12.8 °C | 25.7 °C | 68.07 mm |
| May | 17.7 °C | 29.2 °C | 115.06 mm |
| June | 21.3 °C | 32.8 °C | 90.68 mm |
| July | 22.4 °C | 34.6 °C | 64.26 mm |
| August | 22.3 °C | 35.3 °C | 69.34 mm |
| September | 19.5 °C | 31.9 °C | 88.65 mm |
| October | 13.9 °C | 27.2 °C | 104.9 mm |
| November | 8.2 °C | 20.9 °C | 77.22 mm |
| December | 4.2 °C | 16.5 °C | 71.12 mm |
| Annual | 13.3 °C | 25.8 °C | 945.89 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 10-20 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |