Itta Bena, Mississippi has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12 °C (low) to 23.3 °C (high). Annual precipitation averages 1450.1 Millimeters. Itta Bena is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.4 °C | 11.4 °C | 132.08 mm |
| February | 3.1 °C | 13.9 °C | 132.84 mm |
| March | 7.1 °C | 18.8 °C | 136.4 mm |
| April | 11.8 °C | 23.6 °C | 150.37 mm |
| May | 17 °C | 28.1 °C | 130.56 mm |
| June | 20.9 °C | 31.5 °C | 106.93 mm |
| July | 22.4 °C | 32.8 °C | 113.54 mm |
| August | 21.7 °C | 33.1 °C | 88.14 mm |
| September | 18.1 °C | 30.7 °C | 94.49 mm |
| October | 11.8 °C | 25.1 °C | 98.3 mm |
| November | 6.1 °C | 18.1 °C | 120.65 mm |
| December | 2.7 °C | 12.9 °C | 145.8 mm |
| Annual | 12 °C | 23.3 °C | 1450.1 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |