Newellton, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.9 °F (low) to 76.9 °F (high). Annual precipitation averages 58.6 Inches. Newellton is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 37.0 °F | 57.4 °F | 5.83 in. |
| February | 39.8 °F | 61.8 °F | 5.34 in. |
| March | 47.1 °F | 69.8 °F | 5.74 in. |
| April | 54.5 °F | 77.4 °F | 5.56 in. |
| May | 63.1 °F | 84.4 °F | 4.54 in. |
| June | 70.1 °F | 90.1 °F | 4.71 in. |
| July | 72.6 °F | 92.5 °F | 4.31 in. |
| August | 71.3 °F | 92.8 °F | 4.1 in. |
| September | 65.6 °F | 88.5 °F | 3.93 in. |
| October | 54.0 °F | 79.6 °F | 4.02 in. |
| November | 44.2 °F | 68.1 °F | 4.96 in. |
| December | 39.0 °F | 59.9 °F | 5.56 in. |
| Annual | 54.9 °F | 76.9 °F | 58.6 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |