Marshall, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.5 °F (low) to 76.2 °F (high). Annual precipitation averages 51.1 Inches. Marshall 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 | 35.6 °F | 56.9 °F | 4.18 in. |
| February | 39.1 °F | 61.1 °F | 4.08 in. |
| March | 46.0 °F | 68.8 °F | 5.02 in. |
| April | 53.1 °F | 75.8 °F | 4.71 in. |
| May | 62.5 °F | 83.0 °F | 4.66 in. |
| June | 70.0 °F | 89.7 °F | 4.71 in. |
| July | 72.9 °F | 93.3 °F | 3.37 in. |
| August | 72.2 °F | 94.0 °F | 3.03 in. |
| September | 65.8 °F | 88.2 °F | 3.61 in. |
| October | 54.2 °F | 78.1 °F | 4.67 in. |
| November | 44.4 °F | 66.8 °F | 4.17 in. |
| December | 37.6 °F | 58.5 °F | 4.9 in. |
| Annual | 54.5 °F | 76.2 °F | 51.11 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |