Chauvin, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 15.9 °C (low) to 25.6 °C (high). Annual precipitation averages 1661.7 Millimeters. Chauvin is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.6 °C | 17.1 °C | 136.14 mm |
| February | 8.7 °C | 19.2 °C | 104.14 mm |
| March | 11.9 °C | 22.2 °C | 108.71 mm |
| April | 15.8 °C | 25.1 °C | 124.71 mm |
| May | 20.1 °C | 28.9 °C | 137.67 mm |
| June | 22.9 °C | 31.3 °C | 192.28 mm |
| July | 23.7 °C | 32.3 °C | 205.23 mm |
| August | 23.5 °C | 32.6 °C | 194.31 mm |
| September | 21.9 °C | 30.7 °C | 148.08 mm |
| October | 16.8 °C | 27.1 °C | 105.41 mm |
| November | 10.9 °C | 21.9 °C | 95.76 mm |
| December | 7.7 °C | 18.4 °C | 109.22 mm |
| Annual | 15.9 °C | 25.6 °C | 1661.66 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 |