Timberlane, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 16.2 °C (low) to 25.8 °C (high). Annual precipitation averages 1678.4 Millimeters. Timberlane is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.9 °C | 16.9 °C | 139.7 mm |
| February | 8.8 °C | 18.9 °C | 106.43 mm |
| March | 12 °C | 22.3 °C | 118.36 mm |
| April | 15.7 °C | 25.8 °C | 129.54 mm |
| May | 19.9 °C | 29.6 °C | 136.65 mm |
| June | 23.1 °C | 32.2 °C | 179.58 mm |
| July | 24.1 °C | 33.1 °C | 190.25 mm |
| August | 24.2 °C | 33 °C | 196.34 mm |
| September | 22.3 °C | 31.1 °C | 151.64 mm |
| October | 17.2 °C | 26.9 °C | 100.08 mm |
| November | 11.4 °C | 21.7 °C | 101.09 mm |
| December | 8.2 °C | 18.1 °C | 128.78 mm |
| Annual | 16.2 °C | 25.8 °C | 1678.44 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |