Southside, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.1 °F (low) to 73 °F (high). Annual precipitation averages 57.3 Inches. Southside is located in USDA Plant Hardiness Zone 8a. 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 | 31.4 °F | 52.6 °F | 5.55 in. |
| February | 34.4 °F | 57.1 °F | 5.47 in. |
| March | 40.7 °F | 65.4 °F | 5.57 in. |
| April | 48.4 °F | 73.7 °F | 5.1 in. |
| May | 57.7 °F | 80.8 °F | 4.52 in. |
| June | 65.9 °F | 87.1 °F | 4.9 in. |
| July | 69.4 °F | 90.1 °F | 4.62 in. |
| August | 68.4 °F | 89.6 °F | 4.07 in. |
| September | 62.5 °F | 84.8 °F | 3.98 in. |
| October | 50.2 °F | 75.1 °F | 3.5 in. |
| November | 38.7 °F | 63.7 °F | 4.56 in. |
| December | 33.9 °F | 55.5 °F | 5.5 in. |
| Annual | 50.1 °F | 73 °F | 57.34 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |