| 2023 Hardiness Zone: | Zone 9a: 20°F to 25°F | |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°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 78234 - Jbsa Ft Sam Houston, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 39 | 43 | 50 | 57 | 65 | 71 | 74 | 73 | 68 | 59 | 49 | 41 | 57 |
| Avg Max Temp (°F) | 63 | 68 | 75 | 81 | 87 | 92 | 95 | 95 | 91 | 82 | 72 | 65 | 80 |
| Avg Precip (In.) | 1.65 | 1.79 | 1.9 | 2.59 | 4.52 | 4.19 | 1.96 | 2.56 | 2.99 | 3.73 | 2.58 | 1.92 | 32.37 |