La Porte, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 17.3 °C (low) to 25.1 °C (high). Annual precipitation averages 1492 Millimeters. La Porte is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 7.8 °C | 16.5 °C | 115.82 mm |
| February | 9.7 °C | 18.2 °C | 85.6 mm |
| March | 13.3 °C | 21.3 °C | 92.71 mm |
| April | 16.9 °C | 24.7 °C | 109.47 mm |
| May | 21.2 °C | 28.2 °C | 137.67 mm |
| June | 24.3 °C | 31.3 °C | 152.4 mm |
| July | 25.3 °C | 32.4 °C | 118.11 mm |
| August | 24.9 °C | 32.8 °C | 158.75 mm |
| September | 23 °C | 30.6 °C | 148.34 mm |
| October | 18.7 °C | 26.6 °C | 138.18 mm |
| November | 13.1 °C | 21.5 °C | 120.4 mm |
| December | 8.9 °C | 17.6 °C | 114.55 mm |
| Annual | 17.3 °C | 25.1 °C | 1492 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°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 |