Carthage, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.7 °F (low) to 73.5 °F (high). Annual precipitation averages 55.6 Inches. Carthage 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 | 31.0 °F | 52.2 °F | 4.33 in. |
| February | 34.1 °F | 56.8 °F | 4.7 in. |
| March | 41.1 °F | 65.4 °F | 5.48 in. |
| April | 49.4 °F | 74.7 °F | 5.67 in. |
| May | 59.2 °F | 81.3 °F | 5.41 in. |
| June | 67.1 °F | 88.6 °F | 3.83 in. |
| July | 70.5 °F | 91.9 °F | 4.01 in. |
| August | 69.2 °F | 91.8 °F | 3.37 in. |
| September | 62.2 °F | 85.8 °F | 3.72 in. |
| October | 50.1 °F | 75.3 °F | 4.83 in. |
| November | 40.2 °F | 63.5 °F | 4.55 in. |
| December | 33.7 °F | 54.6 °F | 5.71 in. |
| Annual | 50.7 °F | 73.5 °F | 55.61 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 8a : 10°F to 15°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |