Viola, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.4 °F (low) to 68.9 °F (high). Annual precipitation averages 48.4 Inches. Viola is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 25.1 °F | 45.6 °F | 3.2 in. |
| February | 28.3 °F | 50.6 °F | 3.23 in. |
| March | 36.0 °F | 59.6 °F | 4.63 in. |
| April | 45.7 °F | 69.9 °F | 5.34 in. |
| May | 55.2 °F | 77.0 °F | 5.16 in. |
| June | 63.9 °F | 85.3 °F | 3.66 in. |
| July | 67.7 °F | 89.6 °F | 3.88 in. |
| August | 66.1 °F | 89.4 °F | 3.48 in. |
| September | 58.2 °F | 82.0 °F | 3.9 in. |
| October | 46.2 °F | 70.9 °F | 3.76 in. |
| November | 36.0 °F | 58.5 °F | 4.53 in. |
| December | 28.2 °F | 48.2 °F | 3.61 in. |
| Annual | 46.4 °F | 68.9 °F | 48.38 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |