Blanchard, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.5 °C (low) to 24.6 °C (high). Annual precipitation averages 1340.6 Millimeters. Blanchard 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 °C | 13.7 °C | 117.09 mm |
| February | 3.9 °C | 16.1 °C | 114.05 mm |
| March | 7.7 °C | 20.3 °C | 129.54 mm |
| April | 11.8 °C | 24.6 °C | 128.52 mm |
| May | 17.1 °C | 28.4 °C | 112.01 mm |
| June | 21.2 °C | 32.2 °C | 117.09 mm |
| July | 22.9 °C | 34.1 °C | 88.65 mm |
| August | 22.4 °C | 34.4 °C | 77.98 mm |
| September | 18.9 °C | 31.4 °C | 95.76 mm |
| October | 12.3 °C | 25.6 °C | 119.13 mm |
| November | 6.7 °C | 19.3 °C | 109.22 mm |
| December | 3.1 °C | 14.7 °C | 131.57 mm |
| Annual | 12.5 °C | 24.6 °C | 1340.61 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |