| 2023 Hardiness Zone: | Zone 9a: 20°F to 25°F | |
| 2012 Hardiness Zone: | 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 78251 - San Antonio, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 38 | 42 | 49 | 56 | 65 | 70 | 72 | 72 | 67 | 58 | 48 | 40 | 57 |
| Avg Max Temp (°F) | 63 | 68 | 75 | 81 | 86 | 92 | 95 | 95 | 90 | 82 | 72 | 64 | 80 |
| Avg Precip (In.) | 1.53 | 1.79 | 1.89 | 2.61 | 4.13 | 4.07 | 1.84 | 2.56 | 2.85 | 3.59 | 2.31 | 1.8 | 30.96 |