Mullin, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 52.9 °F (low) to 77.4 °F (high). Annual precipitation averages 30 Inches. Mullin 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 | 33.5 °F | 58.9 °F | 1.68 in. |
| February | 37.5 °F | 62.9 °F | 2.05 in. |
| March | 45.0 °F | 69.7 °F | 2.7 in. |
| April | 51.7 °F | 77.5 °F | 2.34 in. |
| May | 60.9 °F | 84.1 °F | 4.0 in. |
| June | 68.6 °F | 90.9 °F | 3.9 in. |
| July | 71.1 °F | 94.5 °F | 1.81 in. |
| August | 70.9 °F | 94.9 °F | 2.2 in. |
| September | 64.5 °F | 88.3 °F | 2.69 in. |
| October | 53.4 °F | 79.2 °F | 2.95 in. |
| November | 43.2 °F | 67.9 °F | 2.15 in. |
| December | 35.0 °F | 59.8 °F | 1.57 in. |
| Annual | 52.9 °F | 77.4 °F | 30.04 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 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |