Gonzales, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 14.5 °C (low) to 25.8 °C (high). Annual precipitation averages 1658.9 Millimeters. Gonzales is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Jan. 21 - Jan. 31 through the first frost around Dec. 21 - Dec. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.4 °C | 16.8 °C | 149.61 mm |
| February | 7.3 °C | 18.9 °C | 118.11 mm |
| March | 10.6 °C | 22.6 °C | 115.82 mm |
| April | 13.8 °C | 25.8 °C | 135.13 mm |
| May | 18.3 °C | 29.4 °C | 152.4 mm |
| June | 21.8 °C | 32 °C | 175.51 mm |
| July | 23 °C | 32.9 °C | 154.69 mm |
| August | 22.8 °C | 33.2 °C | 174.5 mm |
| September | 20.6 °C | 31.3 °C | 129.54 mm |
| October | 14.7 °C | 27.2 °C | 115.32 mm |
| November | 9.1 °C | 21.7 °C | 106.43 mm |
| December | 6.4 °C | 18 °C | 131.83 mm |
| Annual | 14.5 °C | 25.8 °C | 1658.89 mm |
| Average First Frost Date | Dec. 21 - Dec. 31 |
| Average Last Frost Date | Jan. 21 - Jan. 31 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°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 |