Bald Knob, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.7 °F (low) to 71.1 °F (high). Annual precipitation averages 50.3 Inches. Bald Knob 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 | 30.0 °F | 48.1 °F | 3.56 in. |
| February | 33.3 °F | 52.9 °F | 3.93 in. |
| March | 40.9 °F | 61.9 °F | 4.86 in. |
| April | 50.0 °F | 71.9 °F | 5.34 in. |
| May | 59.9 °F | 79.6 °F | 5.61 in. |
| June | 68.2 °F | 87.9 °F | 3.31 in. |
| July | 71.5 °F | 91.1 °F | 3.57 in. |
| August | 69.5 °F | 90.4 °F | 3.33 in. |
| September | 61.9 °F | 84.0 °F | 3.22 in. |
| October | 49.8 °F | 73.8 °F | 4.11 in. |
| November | 39.9 °F | 60.6 °F | 4.32 in. |
| December | 32.9 °F | 50.7 °F | 5.13 in. |
| Annual | 50.7 °F | 71.1 °F | 50.29 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 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |