Morrow, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.9 °C (low) to 25.6 °C (high). Annual precipitation averages 1550.4 Millimeters. 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 | 4.3 °C | 15.8 °C | 165.86 mm |
| February | 6.4 °C | 18.1 °C | 127.25 mm |
| March | 9.9 °C | 22.1 °C | 113.79 mm |
| April | 13.5 °C | 25.7 °C | 131.32 mm |
| May | 18.2 °C | 29.4 °C | 129.79 mm |
| June | 21.7 °C | 32.3 °C | 137.67 mm |
| July | 22.8 °C | 33.3 °C | 120.65 mm |
| August | 22.4 °C | 33.6 °C | 121.41 mm |
| September | 19.7 °C | 31.3 °C | 116.84 mm |
| October | 13.7 °C | 26.9 °C | 116.59 mm |
| November | 8.3 °C | 21.2 °C | 130.81 mm |
| December | 5.5 °C | 17.1 °C | 138.43 mm |
| Annual | 13.9 °C | 25.6 °C | 1550.41 mm |
| 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 : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |