Millerville, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.2 °C (low) to 23.1 °C (high). Annual precipitation averages 1454.7 Millimeters. Millerville 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 Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.3 °C | 12.5 °C | 141.48 mm |
| February | 1.8 °C | 14.8 °C | 138.18 mm |
| March | 4.9 °C | 19.2 °C | 143 mm |
| April | 9 °C | 23.4 °C | 123.95 mm |
| May | 14.1 °C | 27.2 °C | 113.03 mm |
| June | 18.4 °C | 30.6 °C | 120.65 mm |
| July | 20.4 °C | 32.1 °C | 122.94 mm |
| August | 20 °C | 31.7 °C | 109.22 mm |
| September | 16.7 °C | 29.1 °C | 95.76 mm |
| October | 10.2 °C | 24.2 °C | 86.61 mm |
| November | 4.5 °C | 18.3 °C | 116.59 mm |
| December | 1.8 °C | 13.9 °C | 143.26 mm |
| Annual | 10.2 °C | 23.1 °C | 1454.67 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| 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 7b : -15°C to -12.2°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |