| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F | |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°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: | Cfa - Humid Subtropical Climate | |
| Ecoregion: | 32a - Northern Blackland Prairie | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 121 - 150 days Over 86°F |
Annual Climate Data for ZIP Code 78617 - Del Valle, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 39 | 43 | 50 | 56 | 65 | 70 | 73 | 72 | 67 | 58 | 48 | 41 | 57 |
| Avg Max Temp (°F) | 61 | 65 | 73 | 79 | 85 | 91 | 95 | 96 | 90 | 82 | 71 | 63 | 79 |
| Avg Precip (In.) | 1.94 | 2.11 | 2.21 | 2.6 | 4.95 | 3.94 | 1.9 | 2.26 | 3.02 | 4.01 | 2.8 | 2.44 | 34.18 |