Rotan, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 51 °F (low) to 77.3 °F (high). Annual precipitation averages 22.7 Inches. Rotan is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 30.4 °F | 57.0 °F | 0.96 in. |
| February | 33.7 °F | 61.2 °F | 1.29 in. |
| March | 41.3 °F | 69.6 °F | 1.57 in. |
| April | 49.3 °F | 78.8 °F | 1.69 in. |
| May | 59.6 °F | 86.0 °F | 3.04 in. |
| June | 68.1 °F | 93.0 °F | 3.08 in. |
| July | 71.4 °F | 96.0 °F | 1.69 in. |
| August | 70.4 °F | 95.5 °F | 2.28 in. |
| September | 63.0 °F | 87.5 °F | 2.54 in. |
| October | 51.9 °F | 78.8 °F | 2.03 in. |
| November | 40.4 °F | 66.7 °F | 1.37 in. |
| December | 32.3 °F | 57.8 °F | 1.15 in. |
| Annual | 51 °F | 77.3 °F | 22.69 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |