Indianola, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.2 °C (low) to 22.7 °C (high). Annual precipitation averages 1149.9 Millimeters. Indianola is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2 °C | 10.4 °C | 58.93 mm |
| February | 0.2 °C | 12.7 °C | 58.17 mm |
| March | 4.9 °C | 17.9 °C | 86.87 mm |
| April | 9.5 °C | 22.7 °C | 109.22 mm |
| May | 15.2 °C | 26.6 °C | 149.1 mm |
| June | 20.1 °C | 31.2 °C | 125.48 mm |
| July | 21.8 °C | 33.9 °C | 101.6 mm |
| August | 21.3 °C | 34 °C | 84.84 mm |
| September | 16.7 °C | 30 °C | 111.76 mm |
| October | 10.5 °C | 24.1 °C | 103.89 mm |
| November | 4.6 °C | 17.4 °C | 86.36 mm |
| December | -0.3 °C | 11.7 °C | 73.66 mm |
| Annual | 10.2 °C | 22.7 °C | 1149.88 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |