Hornbeck, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 55.7 °F (low) to 77.4 °F (high). Annual precipitation averages 57.5 Inches. Hornbeck is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 38.1 °F | 58.9 °F | 5.86 in. |
| February | 41.5 °F | 63.3 °F | 4.69 in. |
| March | 48.0 °F | 70.7 °F | 4.93 in. |
| April | 55.0 °F | 77.4 °F | 4.88 in. |
| May | 63.3 °F | 84.5 °F | 4.9 in. |
| June | 70.1 °F | 90.3 °F | 4.71 in. |
| July | 72.3 °F | 92.9 °F | 4.11 in. |
| August | 71.9 °F | 93.7 °F | 4.13 in. |
| September | 66.5 °F | 88.5 °F | 3.87 in. |
| October | 55.9 °F | 79.5 °F | 4.6 in. |
| November | 46.0 °F | 68.8 °F | 5.35 in. |
| December | 39.9 °F | 60.8 °F | 5.48 in. |
| Annual | 55.7 °F | 77.4 °F | 57.51 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |