Mignon, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.1 °C (low) to 23.8 °C (high). Annual precipitation averages 1443.2 Millimeters. Mignon is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.2 °C | 13.1 °C | 136.65 mm |
| February | 1.8 °C | 15.6 °C | 144.53 mm |
| March | 5.2 °C | 19.9 °C | 136.4 mm |
| April | 8.9 °C | 24.2 °C | 124.71 mm |
| May | 14.1 °C | 28 °C | 109.98 mm |
| June | 18.6 °C | 31.2 °C | 126.24 mm |
| July | 20.5 °C | 32.8 °C | 118.87 mm |
| August | 19.9 °C | 32.4 °C | 112.01 mm |
| September | 16.7 °C | 30.1 °C | 96.77 mm |
| October | 9.8 °C | 24.9 °C | 84.33 mm |
| November | 3.8 °C | 18.8 °C | 118.62 mm |
| December | 1.6 °C | 14.4 °C | 134.11 mm |
| Annual | 10.1 °C | 23.8 °C | 1443.22 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |