Kilbourne, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12 °C (low) to 24.1 °C (high). Annual precipitation averages 1465.6 Millimeters. 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 | 1.4 °C | 12.3 °C | 144.78 mm |
| February | 3.2 °C | 14.9 °C | 132.84 mm |
| March | 7.3 °C | 19.4 °C | 133.86 mm |
| April | 11.8 °C | 24.2 °C | 158.24 mm |
| May | 16.9 °C | 28.6 °C | 122.17 mm |
| June | 20.8 °C | 32.2 °C | 98.55 mm |
| July | 22.4 °C | 33.6 °C | 103.63 mm |
| August | 21.7 °C | 33.7 °C | 102.87 mm |
| September | 17.9 °C | 31.3 °C | 90.93 mm |
| October | 11.5 °C | 25.8 °C | 115.82 mm |
| November | 6.1 °C | 18.9 °C | 117.35 mm |
| December | 2.8 °C | 13.8 °C | 144.53 mm |
| Annual | 12 °C | 24.1 °C | 1465.57 mm |
| 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 : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |