Magnolia, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 57.8 °F (low) to 79.3 °F (high). Annual precipitation averages 49.6 Inches. Magnolia is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 40.6 °F | 61.9 °F | 3.91 in. |
| February | 44.3 °F | 65.5 °F | 3.17 in. |
| March | 50.6 °F | 72.2 °F | 3.5 in. |
| April | 57.1 °F | 78.7 °F | 3.72 in. |
| May | 65.4 °F | 85.5 °F | 5.05 in. |
| June | 71.4 °F | 91.3 °F | 5.05 in. |
| July | 73.4 °F | 94.0 °F | 3.34 in. |
| August | 72.9 °F | 95.2 °F | 4.2 in. |
| September | 68.1 °F | 90.0 °F | 4.13 in. |
| October | 58.3 °F | 81.9 °F | 4.9 in. |
| November | 49.0 °F | 71.4 °F | 4.63 in. |
| December | 42.3 °F | 63.6 °F | 4.0 in. |
| Annual | 57.8 °F | 79.3 °F | 49.6 in. |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |