Carlton, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 52.9 °F (low) to 76.5 °F (high). Annual precipitation averages 34.3 Inches. Carlton 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 | 33.4 °F | 57.5 °F | 2.05 in. |
| February | 37.0 °F | 61.4 °F | 2.32 in. |
| March | 44.3 °F | 68.5 °F | 2.99 in. |
| April | 51.7 °F | 76.4 °F | 2.8 in. |
| May | 61.0 °F | 83.1 °F | 4.44 in. |
| June | 68.3 °F | 90.1 °F | 4.17 in. |
| July | 71.5 °F | 94.3 °F | 1.93 in. |
| August | 71.0 °F | 94.9 °F | 2.37 in. |
| September | 64.2 °F | 87.7 °F | 3.08 in. |
| October | 53.7 °F | 78.2 °F | 3.68 in. |
| November | 43.3 °F | 66.9 °F | 2.36 in. |
| December | 35.3 °F | 58.8 °F | 2.11 in. |
| Annual | 52.9 °F | 76.5 °F | 34.3 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 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |