Timberlane, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 61.1 °F (low) to 78.4 °F (high). Annual precipitation averages 66.1 Inches. Timberlane is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 44.4 °F | 62.4 °F | 5.5 in. |
| February | 47.8 °F | 66.0 °F | 4.19 in. |
| March | 53.6 °F | 72.1 °F | 4.66 in. |
| April | 60.2 °F | 78.4 °F | 5.1 in. |
| May | 67.8 °F | 85.3 °F | 5.38 in. |
| June | 73.6 °F | 90.0 °F | 7.07 in. |
| July | 75.4 °F | 91.5 °F | 7.49 in. |
| August | 75.5 °F | 91.4 °F | 7.73 in. |
| September | 72.2 °F | 87.9 °F | 5.97 in. |
| October | 62.9 °F | 80.5 °F | 3.94 in. |
| November | 52.5 °F | 71.0 °F | 3.98 in. |
| December | 46.8 °F | 64.6 °F | 5.07 in. |
| Annual | 61.1 °F | 78.4 °F | 66.08 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |