Coushatta, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.5 °C (low) to 24.9 °C (high). Annual precipitation averages 1428.8 Millimeters. 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 | 2.3 °C | 14.1 °C | 139.95 mm |
| February | 4 °C | 16.7 °C | 127.76 mm |
| March | 7.9 °C | 20.7 °C | 132.08 mm |
| April | 12.1 °C | 24.7 °C | 132.59 mm |
| May | 16.8 °C | 28.7 °C | 126.75 mm |
| June | 21.1 °C | 32.4 °C | 119.13 mm |
| July | 22.5 °C | 34.2 °C | 106.43 mm |
| August | 22.2 °C | 34.3 °C | 96.27 mm |
| September | 18.3 °C | 31.7 °C | 90.93 mm |
| October | 12.1 °C | 26.2 °C | 106.43 mm |
| November | 6.7 °C | 20.1 °C | 115.06 mm |
| December | 3.4 °C | 15.4 °C | 135.38 mm |
| Annual | 12.5 °C | 24.9 °C | 1428.76 mm |
| 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 : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |