Carbon, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.9 °C (low) to 24.6 °C (high). Annual precipitation averages 764.3 Millimeters. Carbon 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 | -0.3 °C | 13.9 °C | 35.05 mm |
| February | 2.1 °C | 16.2 °C | 48.01 mm |
| March | 6.2 °C | 20.3 °C | 61.47 mm |
| April | 10.1 °C | 24.6 °C | 57.15 mm |
| May | 15.6 °C | 28.6 °C | 102.62 mm |
| June | 19.8 °C | 32.3 °C | 101.35 mm |
| July | 21.4 °C | 34.7 °C | 51.31 mm |
| August | 21.1 °C | 34.7 °C | 64.01 mm |
| September | 17.2 °C | 30.7 °C | 70.87 mm |
| October | 11.2 °C | 25.6 °C | 81.03 mm |
| November | 5.3 °C | 19.2 °C | 50.55 mm |
| December | 0.6 °C | 14.3 °C | 40.89 mm |
| Annual | 10.9 °C | 24.6 °C | 764.31 mm |
| 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 : -12.2°C to -9.4°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 |