New Roads, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 57.1 °F (low) to 78 °F (high). Annual precipitation averages 62.3 Inches. New Roads 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 | 40.5 °F | 61.3 °F | 6.75 in. |
| February | 43.7 °F | 65.3 °F | 5.22 in. |
| March | 49.8 °F | 72.1 °F | 4.77 in. |
| April | 56.4 °F | 78.0 °F | 5.31 in. |
| May | 64.6 °F | 84.8 °F | 5.44 in. |
| June | 71.0 °F | 90.1 °F | 6.17 in. |
| July | 72.9 °F | 91.3 °F | 4.72 in. |
| August | 72.4 °F | 91.9 °F | 5.15 in. |
| September | 68.2 °F | 88.1 °F | 4.38 in. |
| October | 57.2 °F | 80.2 °F | 4.59 in. |
| November | 47.0 °F | 70.1 °F | 4.41 in. |
| December | 42.0 °F | 63.3 °F | 5.35 in. |
| Annual | 57.1 °F | 78 °F | 62.26 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 9a : 20°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |