Carthage, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.3 °F (low) to 76.7 °F (high). Annual precipitation averages 52.7 Inches. Carthage is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 35.8 °F | 57.7 °F | 4.6 in. |
| February | 39.4 °F | 62.2 °F | 4.2 in. |
| March | 46.0 °F | 69.6 °F | 5.02 in. |
| April | 53.0 °F | 76.6 °F | 4.94 in. |
| May | 62.3 °F | 83.5 °F | 4.53 in. |
| June | 69.7 °F | 90.1 °F | 4.68 in. |
| July | 72.5 °F | 93.6 °F | 3.32 in. |
| August | 71.7 °F | 94.1 °F | 3.37 in. |
| September | 65.2 °F | 88.5 °F | 3.7 in. |
| October | 53.6 °F | 78.6 °F | 4.55 in. |
| November | 44.1 °F | 67.2 °F | 4.46 in. |
| December | 37.7 °F | 59.2 °F | 5.36 in. |
| Annual | 54.3 °F | 76.7 °F | 52.73 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |