Osyka, Mississippi has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 55.2 °F (low) to 77.8 °F (high). Annual precipitation averages 65.1 Inches. Osyka is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 38.3 °F | 60.7 °F | 6.43 in. |
| February | 41.4 °F | 64.7 °F | 5.63 in. |
| March | 47.9 °F | 71.7 °F | 5.84 in. |
| April | 54.1 °F | 77.7 °F | 5.62 in. |
| May | 62.2 °F | 84.7 °F | 4.83 in. |
| June | 69.0 °F | 90.0 °F | 6.4 in. |
| July | 71.2 °F | 91.7 °F | 6.0 in. |
| August | 71.0 °F | 91.9 °F | 6.16 in. |
| September | 66.4 °F | 88.2 °F | 4.24 in. |
| October | 55.2 °F | 80.2 °F | 4.27 in. |
| November | 45.3 °F | 69.7 °F | 4.15 in. |
| December | 40.2 °F | 62.8 °F | 5.54 in. |
| Annual | 55.2 °F | 77.8 °F | 65.11 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |