Mount Lebanon, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 52.8 °F (low) to 76.2 °F (high). Annual precipitation averages 57.7 Inches. Mount Lebanon is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 34.5 °F | 56.9 °F | 5.46 in. |
| February | 37.4 °F | 61.0 °F | 5.24 in. |
| March | 44.1 °F | 68.7 °F | 5.52 in. |
| April | 51.3 °F | 76.0 °F | 5.69 in. |
| May | 60.8 °F | 83.3 °F | 4.81 in. |
| June | 68.4 °F | 89.9 °F | 4.69 in. |
| July | 71.4 °F | 93.1 °F | 3.82 in. |
| August | 70.6 °F | 93.2 °F | 3.45 in. |
| September | 64.0 °F | 88.4 °F | 3.78 in. |
| October | 52.3 °F | 78.5 °F | 4.78 in. |
| November | 42.5 °F | 66.8 °F | 4.68 in. |
| December | 36.3 °F | 58.7 °F | 5.78 in. |
| Annual | 52.8 °F | 76.2 °F | 57.7 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |