| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°F |
| 2012 Hardiness Zone: | Zone 8a: 10°F to 15°F |
| 1990 Hardiness Zone: | Zone 7b: 5F to 10F |
| Average First Frost Date: | Nov. 11 - Nov. 20 |
| Average Last Frost Date: | Apr. 1 - Apr. 10 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 29c - Western Cross Timbers |
| Heat Zone Days: | 121 - 150 days Over 86°F |
Annual Climate Data for ZIP Code 76472 - Santo, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 31 | 35 | 43 | 51 | 60 | 68 | 71 | 70 | 64 | 53 | 42 | 33 | 52 |
| Avg Max Temp (°F) | 56 | 62 | 70 | 77 | 84 | 91 | 96 | 96 | 89 | 79 | 67 | 58 | 77 |
| Avg Precip (In.) | 1.54 | 1.95 | 2.4 | 2.68 | 4.43 | 3.38 | 2.15 | 2.21 | 2.65 | 3.51 | 1.94 | 1.87 | 30.7 |