Oak Hill, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.4 °C (low) to 24.3 °C (high). Annual precipitation averages 1436.1 Millimeters. Oak Hill 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 | 1.4 °C | 14.4 °C | 135.13 mm |
| February | 3.3 °C | 16.4 °C | 126.24 mm |
| March | 6.8 °C | 20.8 °C | 144.02 mm |
| April | 10.4 °C | 24.5 °C | 114.05 mm |
| May | 15.3 °C | 28.4 °C | 102.11 mm |
| June | 19.7 °C | 31.4 °C | 117.09 mm |
| July | 21.2 °C | 32.8 °C | 137.41 mm |
| August | 20.8 °C | 32.6 °C | 119.63 mm |
| September | 17.9 °C | 30.2 °C | 106.17 mm |
| October | 11.4 °C | 25.1 °C | 85.85 mm |
| November | 5.6 °C | 19.5 °C | 115.82 mm |
| December | 2.9 °C | 15.5 °C | 132.59 mm |
| Annual | 11.4 °C | 24.3 °C | 1436.11 mm |
| 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 : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |