Iuka, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.9 °C (low) to 20 °C (high). Annual precipitation averages 716.8 Millimeters. Iuka is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.5 °C | 6.7 °C | 17.53 mm |
| February | -4.1 °C | 9 °C | 24.38 mm |
| March | 0.9 °C | 14.3 °C | 49.78 mm |
| April | 5.8 °C | 19.5 °C | 61.21 mm |
| May | 11.9 °C | 24.7 °C | 109.47 mm |
| June | 17.4 °C | 30.4 °C | 101.35 mm |
| July | 19.9 °C | 33.1 °C | 90.17 mm |
| August | 18.9 °C | 32.1 °C | 91.69 mm |
| September | 14.4 °C | 27.9 °C | 57.4 mm |
| October | 7.3 °C | 21.3 °C | 59.94 mm |
| November | 0.6 °C | 13.7 °C | 29.72 mm |
| December | -4.3 °C | 7.3 °C | 24.13 mm |
| Annual | 6.9 °C | 20 °C | 716.77 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |