Mountain City, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 56.1 °F (low) to 78.8 °F (high). Annual precipitation averages 37.3 Inches. Mountain City is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 38.0 °F | 61.4 °F | 2.51 in. |
| February | 41.9 °F | 64.9 °F | 1.99 in. |
| March | 48.5 °F | 71.5 °F | 2.95 in. |
| April | 55.2 °F | 78.2 °F | 2.85 in. |
| May | 64.3 °F | 84.8 °F | 5.08 in. |
| June | 70.5 °F | 90.9 °F | 3.57 in. |
| July | 72.3 °F | 94.2 °F | 2.28 in. |
| August | 72.2 °F | 95.8 °F | 2.56 in. |
| September | 66.8 °F | 89.7 °F | 3.59 in. |
| October | 57.0 °F | 81.1 °F | 4.25 in. |
| November | 47.0 °F | 70.3 °F | 2.91 in. |
| December | 39.6 °F | 62.6 °F | 2.73 in. |
| Annual | 56.1 °F | 78.8 °F | 37.27 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |