Magnolia Beach, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 63.1 °F (low) to 78.4 °F (high). Annual precipitation averages 42.4 Inches. Magnolia Beach is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 45.6 °F | 63.5 °F | 3.07 in. |
| February | 49.5 °F | 66.6 °F | 2.13 in. |
| March | 56.2 °F | 71.5 °F | 2.93 in. |
| April | 62.5 °F | 77.3 °F | 2.46 in. |
| May | 70.4 °F | 83.4 °F | 4.03 in. |
| June | 75.9 °F | 88.4 °F | 4.94 in. |
| July | 77.6 °F | 90.4 °F | 3.74 in. |
| August | 77.1 °F | 91.4 °F | 3.25 in. |
| September | 73.0 °F | 88.3 °F | 5.4 in. |
| October | 65.3 °F | 81.7 °F | 4.35 in. |
| November | 56.1 °F | 72.3 °F | 3.32 in. |
| December | 48.0 °F | 65.4 °F | 2.79 in. |
| Annual | 63.1 °F | 78.4 °F | 42.41 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |