Mound Bayou, Mississippi has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 53.3 °F (low) to 73.2 °F (high). Annual precipitation averages 55.1 Inches. Mound Bayou 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. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 33.9 °F | 51.2 °F | 5.13 in. |
| February | 36.6 °F | 55.5 °F | 5.1 in. |
| March | 44.1 °F | 64.3 °F | 5.23 in. |
| April | 53.0 °F | 73.7 °F | 5.81 in. |
| May | 62.6 °F | 82.0 °F | 5.26 in. |
| June | 70.0 °F | 88.7 °F | 3.98 in. |
| July | 72.6 °F | 91.0 °F | 3.84 in. |
| August | 70.9 °F | 91.1 °F | 3.32 in. |
| September | 64.2 °F | 86.8 °F | 3.27 in. |
| October | 52.7 °F | 76.5 °F | 3.9 in. |
| November | 42.5 °F | 63.5 °F | 4.56 in. |
| December | 36.5 °F | 53.9 °F | 5.65 in. |
| Annual | 53.3 °F | 73.2 °F | 55.05 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |