Iola, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 45.1 °F (low) to 66.9 °F (high). Annual precipitation averages 42.3 Inches. Iola is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.1 °F | 41.9 °F | 1.29 in. |
| February | 24.7 °F | 46.7 °F | 1.62 in. |
| March | 34.0 °F | 57.2 °F | 2.75 in. |
| April | 43.7 °F | 67.1 °F | 4.36 in. |
| May | 54.8 °F | 75.2 °F | 5.93 in. |
| June | 64.4 °F | 84.5 °F | 5.38 in. |
| July | 68.7 °F | 89.2 °F | 4.54 in. |
| August | 66.5 °F | 88.5 °F | 4.19 in. |
| September | 57.9 °F | 81.2 °F | 4.46 in. |
| October | 45.6 °F | 69.5 °F | 3.61 in. |
| November | 34.3 °F | 56.5 °F | 2.39 in. |
| December | 25.0 °F | 44.9 °F | 1.82 in. |
| Annual | 45.1 °F | 66.9 °F | 42.34 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |