Kilbourne, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 53.6 °F (low) to 75.3 °F (high). Annual precipitation averages 57.7 Inches. Kilbourne is located in USDA Plant Hardiness Zone 8b. 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 | 34.6 °F | 54.2 °F | 5.7 in. |
| February | 37.8 °F | 58.8 °F | 5.23 in. |
| March | 45.1 °F | 67.0 °F | 5.27 in. |
| April | 53.3 °F | 75.6 °F | 6.23 in. |
| May | 62.4 °F | 83.5 °F | 4.81 in. |
| June | 69.5 °F | 89.9 °F | 3.88 in. |
| July | 72.3 °F | 92.5 °F | 4.08 in. |
| August | 71.0 °F | 92.6 °F | 4.05 in. |
| September | 64.3 °F | 88.3 °F | 3.58 in. |
| October | 52.7 °F | 78.5 °F | 4.56 in. |
| November | 43.0 °F | 66.0 °F | 4.62 in. |
| December | 37.1 °F | 56.8 °F | 5.69 in. |
| Annual | 53.6 °F | 75.3 °F | 57.7 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |