Bayou Vista, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 18 °C (low) to 24.6 °C (high). Annual precipitation averages 1387.6 Millimeters. Bayou Vista is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 8.6 °C | 16.3 °C | 115.06 mm |
| February | 10.5 °C | 17.8 °C | 78.74 mm |
| March | 13.9 °C | 20.8 °C | 84.33 mm |
| April | 17.6 °C | 24 °C | 101.35 mm |
| May | 21.8 °C | 27.4 °C | 104.9 mm |
| June | 24.8 °C | 30.4 °C | 131.57 mm |
| July | 25.8 °C | 31.4 °C | 108.71 mm |
| August | 25.6 °C | 31.8 °C | 149.86 mm |
| September | 23.7 °C | 29.9 °C | 164.85 mm |
| October | 19.5 °C | 26.2 °C | 125.48 mm |
| November | 14.1 °C | 21.5 °C | 114.3 mm |
| December | 9.6 °C | 17.6 °C | 108.46 mm |
| Annual | 18 °C | 24.6 °C | 1387.61 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 9b : -3.9°C to -1.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |