Magnolia, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 14.3 °C (low) to 26.2 °C (high). Annual precipitation averages 1259.8 Millimeters. 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 | 4.8 °C | 16.6 °C | 99.31 mm |
| February | 6.8 °C | 18.6 °C | 80.52 mm |
| March | 10.3 °C | 22.3 °C | 88.9 mm |
| April | 13.9 °C | 25.9 °C | 94.49 mm |
| May | 18.6 °C | 29.7 °C | 128.27 mm |
| June | 21.9 °C | 32.9 °C | 128.27 mm |
| July | 23 °C | 34.4 °C | 84.84 mm |
| August | 22.7 °C | 35.1 °C | 106.68 mm |
| September | 20.1 °C | 32.2 °C | 104.9 mm |
| October | 14.6 °C | 27.7 °C | 124.46 mm |
| November | 9.4 °C | 21.9 °C | 117.6 mm |
| December | 5.7 °C | 17.6 °C | 101.6 mm |
| Annual | 14.3 °C | 26.2 °C | 1259.84 mm |
| 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 : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |