Mathis, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 61.4 °F (low) to 82.3 °F (high). Annual precipitation averages 28.4 Inches. Mathis is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 45.0 °F | 66.8 °F | 1.53 in. |
| February | 49.0 °F | 70.8 °F | 1.34 in. |
| March | 55.3 °F | 76.3 °F | 2.25 in. |
| April | 61.3 °F | 82.2 °F | 1.84 in. |
| May | 68.8 °F | 87.6 °F | 3.06 in. |
| June | 73.5 °F | 92.9 °F | 2.94 in. |
| July | 74.5 °F | 94.7 °F | 2.84 in. |
| August | 74.6 °F | 96.2 °F | 2.3 in. |
| September | 71.2 °F | 91.0 °F | 4.17 in. |
| October | 63.0 °F | 85.0 °F | 2.7 in. |
| November | 53.6 °F | 75.7 °F | 1.72 in. |
| December | 46.9 °F | 68.5 °F | 1.75 in. |
| Annual | 61.4 °F | 82.3 °F | 28.44 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |