| 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: | 33b - Southern Post Oak Savanna |
| Heat Zone Days: | 121 - 150 days Over 86°F |
Annual Climate Data for ZIP Code 77861 - Iola, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 38 | 42 | 49 | 55 | 64 | 70 | 73 | 72 | 67 | 57 | 47 | 40 | 56 |
| Avg Max Temp (°F) | 60 | 65 | 72 | 79 | 85 | 91 | 95 | 96 | 90 | 81 | 70 | 62 | 79 |
| Avg Precip (In.) | 3.61 | 2.88 | 3.27 | 3.26 | 5.28 | 3.92 | 2.44 | 2.94 | 4.26 | 4.47 | 3.83 | 3.56 | 43.72 |