Iola, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 56.8 °F (low) to 79 °F (high). Annual precipitation averages 46 Inches. Iola is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 38.9 °F | 60.7 °F | 3.88 in. |
| February | 42.6 °F | 64.6 °F | 3.18 in. |
| March | 48.9 °F | 71.5 °F | 3.55 in. |
| April | 55.9 °F | 78.5 °F | 3.36 in. |
| May | 64.7 °F | 85.2 °F | 4.96 in. |
| June | 71.3 °F | 91.5 °F | 4.29 in. |
| July | 73.5 °F | 94.8 °F | 2.68 in. |
| August | 73.0 °F | 95.9 °F | 3.24 in. |
| September | 67.5 °F | 90.4 °F | 4.01 in. |
| October | 57.3 °F | 81.6 °F | 4.56 in. |
| November | 47.6 °F | 70.5 °F | 4.01 in. |
| December | 40.6 °F | 62.3 °F | 4.24 in. |
| Annual | 56.8 °F | 79 °F | 45.96 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |