Bayou Gauche, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 60.6 °F (low) to 78.4 °F (high). Annual precipitation averages 64.2 Inches. Bayou Gauche is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 44.3 °F | 63.1 °F | 5.27 in. |
| February | 47.8 °F | 66.7 °F | 4.68 in. |
| March | 53.7 °F | 72.4 °F | 4.29 in. |
| April | 60.1 °F | 78.0 °F | 4.91 in. |
| May | 67.6 °F | 84.4 °F | 5.53 in. |
| June | 73.2 °F | 89.0 °F | 6.78 in. |
| July | 74.9 °F | 90.8 °F | 7.2 in. |
| August | 74.4 °F | 91.1 °F | 6.53 in. |
| September | 71.3 °F | 87.7 °F | 5.92 in. |
| October | 61.6 °F | 80.9 °F | 3.82 in. |
| November | 51.5 °F | 71.6 °F | 4.04 in. |
| December | 46.4 °F | 65.5 °F | 5.21 in. |
| Annual | 60.6 °F | 78.4 °F | 64.18 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |