Coushatta, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.4 °F (low) to 76.9 °F (high). Annual precipitation averages 56.3 Inches. Coushatta 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 | 36.2 °F | 57.4 °F | 5.51 in. |
| February | 39.2 °F | 62.0 °F | 5.03 in. |
| March | 46.3 °F | 69.3 °F | 5.2 in. |
| April | 53.7 °F | 76.5 °F | 5.22 in. |
| May | 62.3 °F | 83.6 °F | 4.99 in. |
| June | 69.9 °F | 90.4 °F | 4.69 in. |
| July | 72.5 °F | 93.5 °F | 4.19 in. |
| August | 72.0 °F | 93.8 °F | 3.79 in. |
| September | 65.0 °F | 89.1 °F | 3.58 in. |
| October | 53.7 °F | 79.2 °F | 4.19 in. |
| November | 44.0 °F | 68.1 °F | 4.53 in. |
| December | 38.1 °F | 59.7 °F | 5.33 in. |
| Annual | 54.4 °F | 76.9 °F | 56.25 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 30-40 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 | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |