| 2023 Hardiness Zone: | 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. 11 - Nov. 20 | |
| Average Last Frost Date: | Mar. 11 - Mar. 20 | |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate | |
| Ecoregion: | 33f - Floodplains and Low Terraces | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 121 - 150 days Over 86°F |
Annual Climate Data for ZIP Code 78957 - Smithville, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 37 | 41 | 48 | 55 | 64 | 70 | 72 | 71 | 66 | 57 | 47 | 39 | 56 |
| Avg Max Temp (°F) | 61 | 66 | 73 | 80 | 85 | 91 | 95 | 96 | 91 | 82 | 71 | 63 | 80 |
| Avg Precip (In.) | 2.75 | 2.36 | 2.53 | 2.99 | 5.09 | 3.86 | 1.98 | 2.33 | 3.65 | 4.62 | 3.31 | 2.83 | 38.29 |