Demopolis, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 52.5 °F (low) to 75.6 °F (high). Annual precipitation averages 55.3 Inches. Demopolis is located in USDA Plant Hardiness Zone 8b. 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 | 34.3 °F | 56.4 °F | 5.49 in. |
| February | 37.4 °F | 60.7 °F | 5.33 in. |
| March | 43.6 °F | 68.9 °F | 5.38 in. |
| April | 51.4 °F | 76.3 °F | 4.84 in. |
| May | 60.1 °F | 83.6 °F | 3.98 in. |
| June | 67.8 °F | 89.1 °F | 4.24 in. |
| July | 70.6 °F | 91.4 °F | 5.35 in. |
| August | 70.1 °F | 91.1 °F | 4.85 in. |
| September | 64.4 °F | 87.1 °F | 3.44 in. |
| October | 52.3 °F | 77.4 °F | 3.26 in. |
| November | 41.1 °F | 66.5 °F | 4.1 in. |
| December | 36.4 °F | 58.5 °F | 5.03 in. |
| Annual | 52.5 °F | 75.6 °F | 55.29 in. |
| 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 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |