Kosciusko, Mississippi has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 51.5 °F (low) to 74.2 °F (high). Annual precipitation averages 59.6 Inches. Kosciusko is located in USDA Plant Hardiness Zone 8a. 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 | 33.2 °F | 54.7 °F | 5.32 in. |
| February | 35.9 °F | 59.3 °F | 5.33 in. |
| March | 42.7 °F | 67.4 °F | 5.93 in. |
| April | 50.3 °F | 74.9 °F | 5.85 in. |
| May | 59.2 °F | 81.6 °F | 4.8 in. |
| June | 66.9 °F | 88.2 °F | 4.26 in. |
| July | 70.1 °F | 90.6 °F | 5.6 in. |
| August | 69.1 °F | 90.4 °F | 4.28 in. |
| September | 62.9 °F | 85.7 °F | 4.05 in. |
| October | 51.2 °F | 75.9 °F | 3.99 in. |
| November | 40.9 °F | 65.2 °F | 4.57 in. |
| December | 35.6 °F | 56.9 °F | 5.57 in. |
| Annual | 51.5 °F | 74.2 °F | 59.55 in. |
| 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 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |