| 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 8a: 10F to 15F | |
| 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: | 29e - Limestone Cut Plain | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 121 - 150 days Over 86°F |
Annual Climate Data for ZIP Code 76543 - Killeen, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 35 | 39 | 46 | 54 | 62 | 68 | 71 | 70 | 65 | 55 | 45 | 38 | 54 |
| Avg Max Temp (°F) | 61 | 67 | 73 | 79 | 85 | 91 | 95 | 95 | 90 | 81 | 70 | 64 | 79 |
| Avg Precip (In.) | 1.94 | 2.56 | 2.58 | 2.84 | 4.6 | 3.77 | 1.92 | 2.28 | 3.29 | 3.71 | 2.87 | 2.62 | 35 |