Magnolia, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.1 °C (low) to 19.3 °C (high). Annual precipitation averages 1339.1 Millimeters. Magnolia is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.4 °C | 6 °C | 99.82 mm |
| February | -1.6 °C | 8.8 °C | 102.11 mm |
| March | 2.2 °C | 13.7 °C | 126.24 mm |
| April | 7.6 °C | 20 °C | 118.87 mm |
| May | 13.2 °C | 24.2 °C | 145.03 mm |
| June | 17.3 °C | 28.8 °C | 125.98 mm |
| July | 19.4 °C | 30.3 °C | 121.67 mm |
| August | 18.6 °C | 29.8 °C | 93.98 mm |
| September | 14.8 °C | 26.8 °C | 97.03 mm |
| October | 8.2 °C | 21.2 °C | 96.77 mm |
| November | 2.6 °C | 13.8 °C | 92.96 mm |
| December | -1.2 °C | 8 °C | 118.62 mm |
| Annual | 8.1 °C | 19.3 °C | 1339.08 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |