Clarks, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 53.5 °F (low) to 76.9 °F (high). Annual precipitation averages 58.8 Inches. Clarks 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 | 35.7 °F | 57.8 °F | 5.8 in. |
| February | 38.4 °F | 61.9 °F | 5.12 in. |
| March | 45.4 °F | 70.0 °F | 5.41 in. |
| April | 52.6 °F | 77.0 °F | 5.96 in. |
| May | 61.6 °F | 84.3 °F | 4.88 in. |
| June | 68.7 °F | 90.1 °F | 4.67 in. |
| July | 71.4 °F | 92.8 °F | 4.38 in. |
| August | 70.4 °F | 93.5 °F | 3.68 in. |
| September | 64.5 °F | 88.7 °F | 3.72 in. |
| October | 53.0 °F | 79.4 °F | 4.41 in. |
| November | 43.3 °F | 68.0 °F | 5.07 in. |
| December | 37.4 °F | 59.7 °F | 5.7 in. |
| Annual | 53.5 °F | 76.9 °F | 58.8 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |