| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F Zone 8a: 10°F to 15°F Zone 7b: 5°F to 10°F | |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F Zone 8a: 10°F to 15°F Zone 7b: 5°F to 10°F | |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F | |
| Average First Frost Date: | Oct. 21 - Oct. 31 | |
| Average Last Frost Date: | Apr. 21 - Apr. 30 | |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate | |
| Ecoregion: | 24b - Chihuahuan Desert Grasslands | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 79843 - Marfa, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 25 | 28 | 33 | 41 | 50 | 58 | 60 | 59 | 54 | 44 | 33 | 26 | 42 |
| Avg Max Temp (°F) | 60 | 64 | 71 | 78 | 85 | 87 | 89 | 87 | 83 | 77 | 67 | 60 | 76 |
| Avg Precip (In.) | .41 | .46 | .24 | .65 | 1.31 | 1.85 | 2.78 | 2.7 | 2.81 | 1.48 | .41 | .58 | 15.7 |