Clarksville, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.3 °F (low) to 72.2 °F (high). Annual precipitation averages 50.3 Inches. Clarksville 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 | 28.5 °F | 49.7 °F | 3.49 in. |
| February | 31.8 °F | 54.7 °F | 3.07 in. |
| March | 39.3 °F | 63.4 °F | 4.62 in. |
| April | 47.9 °F | 72.6 °F | 5.16 in. |
| May | 57.8 °F | 79.9 °F | 5.35 in. |
| June | 66.6 °F | 87.8 °F | 4.15 in. |
| July | 70.1 °F | 92.4 °F | 3.63 in. |
| August | 69.0 °F | 92.6 °F | 3.51 in. |
| September | 61.3 °F | 85.5 °F | 3.79 in. |
| October | 49.2 °F | 74.3 °F | 4.2 in. |
| November | 38.7 °F | 61.9 °F | 4.94 in. |
| December | 31.3 °F | 51.9 °F | 4.34 in. |
| Annual | 49.3 °F | 72.2 °F | 50.25 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 7a : 0°F to 5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |