Morrow, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 57 °F (low) to 78 °F (high). Annual precipitation averages 61 Inches. Morrow is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 39.8 °F | 60.5 °F | 6.53 in. |
| February | 43.5 °F | 64.6 °F | 5.01 in. |
| March | 49.8 °F | 71.7 °F | 4.48 in. |
| April | 56.3 °F | 78.2 °F | 5.17 in. |
| May | 64.8 °F | 84.9 °F | 5.11 in. |
| June | 71.1 °F | 90.2 °F | 5.42 in. |
| July | 73.1 °F | 91.9 °F | 4.75 in. |
| August | 72.3 °F | 92.5 °F | 4.78 in. |
| September | 67.4 °F | 88.4 °F | 4.6 in. |
| October | 56.7 °F | 80.4 °F | 4.59 in. |
| November | 47.0 °F | 70.1 °F | 5.15 in. |
| December | 41.9 °F | 62.8 °F | 5.45 in. |
| Annual | 57 °F | 78 °F | 61.04 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| 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 |