Silverhill, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.8 °C (low) to 25 °C (high). Annual precipitation averages 1773.7 Millimeters. Silverhill is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 4.2 °C | 16.1 °C | 135.38 mm |
| February | 6.1 °C | 18.2 °C | 117.09 mm |
| March | 9.4 °C | 21.3 °C | 138.94 mm |
| April | 13 °C | 24.8 °C | 146.3 mm |
| May | 17.4 °C | 28.6 °C | 119.63 mm |
| June | 21.8 °C | 31.2 °C | 179.83 mm |
| July | 22.8 °C | 32.1 °C | 215.65 mm |
| August | 22.5 °C | 32 °C | 187.71 mm |
| September | 19.9 °C | 30.4 °C | 162.56 mm |
| October | 14.1 °C | 26.4 °C | 117.35 mm |
| November | 8.4 °C | 21.3 °C | 117.35 mm |
| December | 5.7 °C | 17.4 °C | 135.89 mm |
| Annual | 13.8 °C | 25 °C | 1773.68 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |