Lake Jackson, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 61.2 °F (low) to 79.1 °F (high). Annual precipitation averages 47.9 Inches. Lake Jackson is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 44.2 °F | 63.9 °F | 4.04 in. |
| February | 48.2 °F | 66.8 °F | 2.64 in. |
| March | 54.1 °F | 72.4 °F | 3.01 in. |
| April | 60.3 °F | 78.2 °F | 3.14 in. |
| May | 68.1 °F | 84.3 °F | 3.85 in. |
| June | 73.7 °F | 89.8 °F | 4.44 in. |
| July | 75.3 °F | 91.5 °F | 3.92 in. |
| August | 75.2 °F | 92.4 °F | 4.8 in. |
| September | 71.3 °F | 88.8 °F | 6.06 in. |
| October | 63.5 °F | 82.3 °F | 4.19 in. |
| November | 53.9 °F | 73.2 °F | 4.08 in. |
| December | 46.4 °F | 66.1 °F | 3.77 in. |
| Annual | 61.2 °F | 79.1 °F | 47.94 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |