Bayou Vista, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 64.3 °F (low) to 76.3 °F (high). Annual precipitation averages 54.6 Inches. Bayou Vista is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 47.4 °F | 61.4 °F | 4.53 in. |
| February | 50.9 °F | 64.1 °F | 3.1 in. |
| March | 57.1 °F | 69.4 °F | 3.32 in. |
| April | 63.6 °F | 75.2 °F | 3.99 in. |
| May | 71.2 °F | 81.4 °F | 4.13 in. |
| June | 76.7 °F | 86.7 °F | 5.18 in. |
| July | 78.5 °F | 88.6 °F | 4.28 in. |
| August | 78.1 °F | 89.3 °F | 5.9 in. |
| September | 74.7 °F | 85.8 °F | 6.49 in. |
| October | 67.1 °F | 79.1 °F | 4.94 in. |
| November | 57.4 °F | 70.7 °F | 4.5 in. |
| December | 49.3 °F | 63.6 °F | 4.27 in. |
| Annual | 64.3 °F | 76.3 °F | 54.63 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 9b : 25°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |