Merrydale, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 57.3 °F (low) to 78.3 °F (high). Annual precipitation averages 65.3 Inches. Merrydale is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 40.7 °F | 61.7 °F | 6.39 in. |
| February | 44.1 °F | 65.7 °F | 4.99 in. |
| March | 50.1 °F | 72.3 °F | 4.7 in. |
| April | 56.5 °F | 78.5 °F | 5.17 in. |
| May | 64.6 °F | 85.1 °F | 5.8 in. |
| June | 70.9 °F | 89.8 °F | 6.68 in. |
| July | 73.1 °F | 91.2 °F | 5.88 in. |
| August | 72.6 °F | 91.8 °F | 6.58 in. |
| September | 68.3 °F | 88.3 °F | 4.74 in. |
| October | 57.4 °F | 80.5 °F | 4.82 in. |
| November | 47.4 °F | 70.5 °F | 4.18 in. |
| December | 42.4 °F | 63.7 °F | 5.36 in. |
| Annual | 57.3 °F | 78.3 °F | 65.29 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |