La Porte, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 63.1 °F (low) to 77.3 °F (high). Annual precipitation averages 58.7 Inches. La Porte is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 46.1 °F | 61.7 °F | 4.56 in. |
| February | 49.5 °F | 64.8 °F | 3.37 in. |
| March | 55.9 °F | 70.4 °F | 3.65 in. |
| April | 62.4 °F | 76.5 °F | 4.31 in. |
| May | 70.1 °F | 82.8 °F | 5.42 in. |
| June | 75.7 °F | 88.4 °F | 6.0 in. |
| July | 77.6 °F | 90.4 °F | 4.65 in. |
| August | 76.9 °F | 91.1 °F | 6.25 in. |
| September | 73.4 °F | 87.1 °F | 5.84 in. |
| October | 65.7 °F | 79.9 °F | 5.44 in. |
| November | 55.5 °F | 70.7 °F | 4.74 in. |
| December | 48.0 °F | 63.6 °F | 4.51 in. |
| Annual | 63.1 °F | 77.3 °F | 58.74 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 |