Marfa, Texas has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 44.4 °F (low) to 76.2 °F (high). Annual precipitation averages 13.5 Inches. Marfa is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 27.2 °F | 58.9 °F | 0.57 in. |
| February | 30.2 °F | 63.8 °F | 0.47 in. |
| March | 35.7 °F | 70.6 °F | 0.33 in. |
| April | 42.7 °F | 78.4 °F | 0.45 in. |
| May | 51.9 °F | 85.7 °F | 0.92 in. |
| June | 60.2 °F | 91.2 °F | 1.65 in. |
| July | 61.8 °F | 89.2 °F | 2.76 in. |
| August | 61.1 °F | 88.8 °F | 2.3 in. |
| September | 55.2 °F | 83.4 °F | 2.12 in. |
| October | 45.3 °F | 77.5 °F | 1.04 in. |
| November | 33.9 °F | 67.4 °F | 0.48 in. |
| December | 27.8 °F | 59.8 °F | 0.45 in. |
| Annual | 44.4 °F | 76.2 °F | 13.54 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 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 | Normal |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |