Carthage, Mississippi has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.9 °C (low) to 24.3 °C (high). Annual precipitation averages 1466.8 Millimeters. 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. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.1 °C | 13.7 °C | 136.14 mm |
| February | 2.7 °C | 16.3 °C | 138.18 mm |
| March | 6.4 °C | 20.5 °C | 139.95 mm |
| April | 10.3 °C | 24.5 °C | 153.92 mm |
| May | 15.1 °C | 28.3 °C | 115.57 mm |
| June | 19.3 °C | 31.8 °C | 96.77 mm |
| July | 20.9 °C | 33.2 °C | 132.33 mm |
| August | 20.4 °C | 33.1 °C | 115.32 mm |
| September | 17.2 °C | 30.7 °C | 98.04 mm |
| October | 10.4 °C | 25.6 °C | 93.22 mm |
| November | 4.9 °C | 19.3 °C | 113.03 mm |
| December | 2.3 °C | 14.9 °C | 134.37 mm |
| Annual | 10.9 °C | 24.3 °C | 1466.84 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |