Iuka, Mississippi has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.5 °C (low) to 22 °C (high). Annual precipitation averages 1513.6 Millimeters. Iuka is located in USDA Plant Hardiness Zone 7b. 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 | -1.3 °C | 10.1 °C | 132.84 mm |
| February | 0.3 °C | 12.7 °C | 136.14 mm |
| March | 4.2 °C | 17.5 °C | 144.53 mm |
| April | 8.9 °C | 22.7 °C | 138.68 mm |
| May | 14.1 °C | 26.6 °C | 141.73 mm |
| June | 18.6 °C | 30.3 °C | 111.51 mm |
| July | 20.3 °C | 31.9 °C | 117.6 mm |
| August | 19.7 °C | 31.8 °C | 115.82 mm |
| September | 15.9 °C | 29 °C | 112.27 mm |
| October | 9.1 °C | 23.3 °C | 95.76 mm |
| November | 3.3 °C | 16.8 °C | 111.25 mm |
| December | 0.4 °C | 11.5 °C | 155.45 mm |
| Annual | 9.5 °C | 22 °C | 1513.58 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| 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 |