| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F | |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°F | |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F | |
| Average First Frost Date: | Nov. 11 - Nov. 20 | |
| Average Last Frost Date: | Mar. 21 - Mar. 31 | |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate | |
| Ecoregion: | 30b - Llano Uplift | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 121 - 150 days Over 86°F |
Annual Climate Data for ZIP Code 78609 - Buchanan Dam, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 33 | 37 | 45 | 53 | 62 | 69 | 71 | 71 | 65 | 54 | 44 | 36 | 53 |
| Avg Max Temp (°F) | 60 | 64 | 72 | 79 | 85 | 91 | 95 | 95 | 89 | 80 | 69 | 61 | 78 |
| Avg Precip (In.) | 1.29 | 1.96 | 2.07 | 2.42 | 4.26 | 3.59 | 1.82 | 2.23 | 2.58 | 3.2 | 2.2 | 1.94 | 29.56 |