Sylvan Springs, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 52.7 °F (low) to 73.7 °F (high). Annual precipitation averages 58.3 Inches. Sylvan Springs 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 | 34.3 °F | 54.0 °F | 5.37 in. |
| February | 36.9 °F | 58.5 °F | 5.52 in. |
| March | 43.8 °F | 66.4 °F | 5.69 in. |
| April | 51.0 °F | 74.4 °F | 5.19 in. |
| May | 60.1 °F | 81.3 °F | 4.46 in. |
| June | 67.6 °F | 87.3 °F | 4.89 in. |
| July | 70.8 °F | 90.3 °F | 5.01 in. |
| August | 70.2 °F | 89.9 °F | 4.25 in. |
| September | 64.8 °F | 85.5 °F | 4.49 in. |
| October | 53.1 °F | 75.4 °F | 3.4 in. |
| November | 42.5 °F | 64.5 °F | 4.73 in. |
| December | 36.7 °F | 56.3 °F | 5.33 in. |
| Annual | 52.7 °F | 73.7 °F | 58.33 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 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |