Harvest, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.5 °C (low) to 21.3 °C (high). Annual precipitation averages 1467.1 Millimeters. Harvest 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 | -1.1 °C | 9.4 °C | 139.95 mm |
| February | 0.4 °C | 11.8 °C | 135.38 mm |
| March | 4.3 °C | 16.7 °C | 133.1 mm |
| April | 9 °C | 21.6 °C | 130.81 mm |
| May | 14.3 °C | 25.8 °C | 113.79 mm |
| June | 18.3 °C | 29.6 °C | 116.33 mm |
| July | 20.2 °C | 31.2 °C | 127.25 mm |
| August | 19.4 °C | 31 °C | 104.65 mm |
| September | 15.8 °C | 28.3 °C | 99.82 mm |
| October | 9.2 °C | 22.7 °C | 93.47 mm |
| November | 3.3 °C | 16.1 °C | 113.54 mm |
| December | 0.6 °C | 11.1 °C | 159 mm |
| Annual | 9.5 °C | 21.3 °C | 1467.09 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 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |