Bayside, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 62.9 °F (low) to 80.3 °F (high). Annual precipitation averages 35 Inches. Bayside is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 46.3 °F | 65.5 °F | 2.1 in. |
| February | 50.3 °F | 69.0 °F | 1.81 in. |
| March | 56.5 °F | 74.1 °F | 2.65 in. |
| April | 62.8 °F | 79.5 °F | 2.02 in. |
| May | 70.3 °F | 85.2 °F | 3.3 in. |
| June | 75.2 °F | 90.2 °F | 3.68 in. |
| July | 76.6 °F | 91.5 °F | 3.15 in. |
| August | 76.2 °F | 93.1 °F | 2.7 in. |
| September | 72.6 °F | 89.7 °F | 5.54 in. |
| October | 65.2 °F | 83.4 °F | 3.55 in. |
| November | 55.3 °F | 74.4 °F | 2.49 in. |
| December | 48.0 °F | 67.6 °F | 2.04 in. |
| Annual | 62.9 °F | 80.3 °F | 35.03 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 |