McKenzie, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.8 °C (low) to 25.1 °C (high). Annual precipitation averages 1516.6 Millimeters. McKenzie is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.9 °C | 15.1 °C | 141.22 mm |
| February | 4.9 °C | 17.6 °C | 120.4 mm |
| March | 8.3 °C | 21.7 °C | 143.26 mm |
| April | 12 °C | 25.1 °C | 117.86 mm |
| May | 16.7 °C | 29.1 °C | 105.66 mm |
| June | 20 °C | 31.8 °C | 138.43 mm |
| July | 22.2 °C | 33.1 °C | 153.67 mm |
| August | 21.9 °C | 32.8 °C | 134.37 mm |
| September | 19.5 °C | 30.8 °C | 117.86 mm |
| October | 13.2 °C | 26 °C | 93.98 mm |
| November | 7.3 °C | 20.6 °C | 114.55 mm |
| December | 4.7 °C | 16.9 °C | 135.38 mm |
| Annual | 12.8 °C | 25.1 °C | 1516.64 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |