Magnolia, Delaware has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.1 °F (low) to 65 °F (high). Annual precipitation averages 46.2 Inches. Magnolia is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 26.3 °F | 43.0 °F | 3.41 in. |
| February | 27.4 °F | 45.1 °F | 3.01 in. |
| March | 34.3 °F | 52.4 °F | 4.18 in. |
| April | 44.4 °F | 63.8 °F | 3.57 in. |
| May | 54.1 °F | 72.7 °F | 3.82 in. |
| June | 63.5 °F | 81.5 °F | 4.09 in. |
| July | 68.6 °F | 86.3 °F | 4.08 in. |
| August | 66.8 °F | 84.4 °F | 4.8 in. |
| September | 60.5 °F | 78.3 °F | 4.14 in. |
| October | 49.2 °F | 67.7 °F | 3.93 in. |
| November | 38.6 °F | 56.9 °F | 3.2 in. |
| December | 30.9 °F | 47.6 °F | 3.93 in. |
| Annual | 47.1 °F | 65 °F | 46.16 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |