Grand Point, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 59 °F (low) to 78.5 °F (high). Annual precipitation averages 66.1 Inches. Grand Point is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Jan. 21 - Jan. 31 through the first frost around Dec. 21 - Dec. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 42.8 °F | 62.8 °F | 5.74 in. |
| February | 46.2 °F | 66.5 °F | 4.22 in. |
| March | 52.2 °F | 72.7 °F | 4.29 in. |
| April | 57.9 °F | 78.2 °F | 5.03 in. |
| May | 66.0 °F | 84.7 °F | 6.35 in. |
| June | 71.9 °F | 89.5 °F | 7.92 in. |
| July | 74.0 °F | 91.0 °F | 6.95 in. |
| August | 73.5 °F | 91.4 °F | 7.34 in. |
| September | 69.9 °F | 88.2 °F | 5.22 in. |
| October | 59.6 °F | 80.9 °F | 4.17 in. |
| November | 49.6 °F | 71.4 °F | 4.08 in. |
| December | 44.8 °F | 65.0 °F | 4.74 in. |
| Annual | 59 °F | 78.5 °F | 66.05 in. |
| Average First Frost Date | Dec. 21 - Dec. 31 |
| Average Last Frost Date | Jan. 21 - Jan. 31 |
| 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 |