| 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 | |
| 1990 Hardiness Zone: | Zone 8b: 15F to 20F | |
| Average First Frost Date: | Nov. 21 - Nov. 30 | |
| Average Last Frost Date: | Mar. 1 - Mar. 10 | |
| 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 79834 - Big Bend National Park, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 34 | 38 | 45 | 52 | 61 | 67 | 69 | 68 | 63 | 53 | 43 | 35 | 52 |
| Avg Max Temp (°F) | 62 | 68 | 76 | 83 | 90 | 93 | 94 | 93 | 88 | 80 | 71 | 63 | 80 |
| Avg Precip (In.) | .39 | .47 | .27 | .56 | 1.42 | 1.84 | 2.25 | 2.3 | 2.05 | 1.48 | .53 | .48 | 14.03 |