Holt, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.2 °C (low) to 23.8 °C (high). Annual precipitation averages 1374.9 Millimeters. Holt is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.9 °C | 13 °C | 135.38 mm |
| February | 2.7 °C | 15.4 °C | 139.19 mm |
| March | 6.2 °C | 19.9 °C | 122.94 mm |
| April | 10.3 °C | 24.1 °C | 124.97 mm |
| May | 15.4 °C | 28.1 °C | 95.5 mm |
| June | 19.6 °C | 31.5 °C | 123.95 mm |
| July | 21.3 °C | 32.9 °C | 108.71 mm |
| August | 21 °C | 32.8 °C | 108.2 mm |
| September | 17.8 °C | 30.4 °C | 87.38 mm |
| October | 11.4 °C | 24.8 °C | 81.79 mm |
| November | 5.3 °C | 18.8 °C | 120.14 mm |
| December | 2.4 °C | 14.2 °C | 126.75 mm |
| Annual | 11.2 °C | 23.8 °C | 1374.9 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 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 |