Texarkana, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.5 °C (low) to 23.9 °C (high). Annual precipitation averages 1311.4 Millimeters. Texarkana is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.8 °C | 12.8 °C | 104.14 mm |
| February | 2.6 °C | 14.9 °C | 115.32 mm |
| March | 6.7 °C | 19.6 °C | 119.89 mm |
| April | 10.8 °C | 23.8 °C | 121.67 mm |
| May | 16.1 °C | 27.8 °C | 131.57 mm |
| June | 20.5 °C | 31.8 °C | 103.89 mm |
| July | 22.2 °C | 34.1 °C | 84.84 mm |
| August | 21.6 °C | 34.2 °C | 73.91 mm |
| September | 17.8 °C | 30.8 °C | 100.33 mm |
| October | 11.3 °C | 25.1 °C | 120.9 mm |
| November | 5.8 °C | 18.6 °C | 107.19 mm |
| December | 2.1 °C | 13.8 °C | 127.76 mm |
| Annual | 11.5 °C | 23.9 °C | 1311.41 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |