Sylvania, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.8 °F (low) to 69.3 °F (high). Annual precipitation averages 58 Inches. Sylvania is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 28.7 °F | 48.3 °F | 5.92 in. |
| February | 32.7 °F | 52.8 °F | 5.68 in. |
| March | 38.6 °F | 61.1 °F | 5.55 in. |
| April | 46.0 °F | 69.8 °F | 5.19 in. |
| May | 55.0 °F | 77.2 °F | 4.51 in. |
| June | 63.8 °F | 84.2 °F | 4.65 in. |
| July | 66.1 °F | 86.8 °F | 4.33 in. |
| August | 65.2 °F | 86.5 °F | 3.46 in. |
| September | 59.3 °F | 81.5 °F | 4.37 in. |
| October | 47.8 °F | 71.6 °F | 3.31 in. |
| November | 37.4 °F | 59.8 °F | 4.96 in. |
| December | 32.8 °F | 51.5 °F | 6.08 in. |
| Annual | 47.8 °F | 69.3 °F | 58.01 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |