Black Oak, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.2 °C (low) to 21.5 °C (high). Annual precipitation averages 1311.9 Millimeters. Black Oak 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 | -1.6 °C | 7.9 °C | 100.33 mm |
| February | 0.2 °C | 10.8 °C | 104.39 mm |
| March | 4.5 °C | 15.8 °C | 123.44 mm |
| April | 9.6 °C | 21.9 °C | 147.07 mm |
| May | 15.8 °C | 26.8 °C | 128.27 mm |
| June | 20.3 °C | 31.5 °C | 93.47 mm |
| July | 22 °C | 32.7 °C | 92.71 mm |
| August | 20.7 °C | 32.4 °C | 89.41 mm |
| September | 16.5 °C | 29.2 °C | 88.65 mm |
| October | 9.8 °C | 23.3 °C | 105.66 mm |
| November | 4.3 °C | 15.7 °C | 114.3 mm |
| December | 0.2 °C | 9.7 °C | 124.21 mm |
| Annual | 10.2 °C | 21.5 °C | 1311.91 mm |
| 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 : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |