Boutte, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 15.9 °C (low) to 25.8 °C (high). Annual precipitation averages 1651.3 Millimeters. Boutte is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.8 °C | 17.2 °C | 138.18 mm |
| February | 8.7 °C | 19.2 °C | 114.3 mm |
| March | 12.1 °C | 22.5 °C | 112.52 mm |
| April | 15.5 °C | 25.7 °C | 125.98 mm |
| May | 19.7 °C | 29.3 °C | 143.26 mm |
| June | 22.9 °C | 31.8 °C | 182.63 mm |
| July | 23.8 °C | 32.8 °C | 185.93 mm |
| August | 23.7 °C | 32.9 °C | 173.48 mm |
| September | 21.9 °C | 31.1 °C | 143.76 mm |
| October | 16.6 °C | 27.1 °C | 99.57 mm |
| November | 11 °C | 21.9 °C | 102.87 mm |
| December | 8.1 °C | 18.4 °C | 128.78 mm |
| Annual | 15.9 °C | 25.8 °C | 1651.26 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |