Wortham, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 55.4 °F (low) to 77.8 °F (high). Annual precipitation averages 41.4 Inches. Wortham 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 | 36.5 °F | 58.5 °F | 3.02 in. |
| February | 40.3 °F | 62.7 °F | 3.12 in. |
| March | 47.2 °F | 69.4 °F | 3.84 in. |
| April | 54.2 °F | 77.1 °F | 3.56 in. |
| May | 63.3 °F | 83.9 °F | 4.41 in. |
| June | 70.7 °F | 91.3 °F | 3.95 in. |
| July | 73.2 °F | 95.2 °F | 1.92 in. |
| August | 72.7 °F | 96.4 °F | 2.56 in. |
| September | 66.4 °F | 90.2 °F | 3.28 in. |
| October | 55.9 °F | 80.1 °F | 4.6 in. |
| November | 45.9 °F | 68.7 °F | 3.39 in. |
| December | 38.3 °F | 60.2 °F | 3.7 in. |
| Annual | 55.4 °F | 77.8 °F | 41.35 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |