Walnut Ridge, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.7 °F (low) to 69.5 °F (high). Annual precipitation averages 50.5 Inches. Walnut Ridge is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 28.6 °F | 45.5 °F | 3.84 in. |
| February | 31.7 °F | 50.5 °F | 3.97 in. |
| March | 39.6 °F | 60.0 °F | 4.73 in. |
| April | 49.0 °F | 70.2 °F | 5.35 in. |
| May | 59.5 °F | 78.9 °F | 5.18 in. |
| June | 67.7 °F | 87.3 °F | 3.44 in. |
| July | 71.2 °F | 90.0 °F | 3.66 in. |
| August | 68.9 °F | 88.8 °F | 3.66 in. |
| September | 60.9 °F | 82.9 °F | 3.57 in. |
| October | 48.9 °F | 72.8 °F | 4.0 in. |
| November | 39.1 °F | 59.2 °F | 4.68 in. |
| December | 31.6 °F | 48.3 °F | 4.45 in. |
| Annual | 49.7 °F | 69.5 °F | 50.53 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |