Quitman, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.6 °C (low) to 24.5 °C (high). Annual precipitation averages 1154.4 Millimeters. Quitman is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.8 °C | 13.3 °C | 86.61 mm |
| February | 2.7 °C | 15.8 °C | 97.28 mm |
| March | 6.6 °C | 19.9 °C | 107.44 mm |
| April | 10.6 °C | 24.1 °C | 100.58 mm |
| May | 16.2 °C | 28.1 °C | 117.6 mm |
| June | 20.5 °C | 32.2 °C | 98.81 mm |
| July | 22.2 °C | 34.3 °C | 66.8 mm |
| August | 21.6 °C | 34.8 °C | 66.55 mm |
| September | 17.8 °C | 31.3 °C | 85.85 mm |
| October | 11.5 °C | 25.7 °C | 118.87 mm |
| November | 6.1 °C | 19.4 °C | 94.49 mm |
| December | 2.1 °C | 14.6 °C | 113.54 mm |
| Annual | 11.6 °C | 24.5 °C | 1154.42 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |