Commerce, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.8 °C (low) to 24 °C (high). Annual precipitation averages 1146.3 Millimeters. Commerce 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 | 0.7 °C | 12.6 °C | 74.42 mm |
| February | 2.7 °C | 14.9 °C | 86.11 mm |
| March | 6.7 °C | 19.1 °C | 105.66 mm |
| April | 10.8 °C | 23.4 °C | 106.68 mm |
| May | 16.3 °C | 27.6 °C | 132.08 mm |
| June | 20.8 °C | 32.1 °C | 96.52 mm |
| July | 22.8 °C | 34.6 °C | 67.56 mm |
| August | 22.3 °C | 34.9 °C | 65.02 mm |
| September | 18.3 °C | 31.2 °C | 83.31 mm |
| October | 11.9 °C | 25.3 °C | 132.33 mm |
| November | 6.3 °C | 18.7 °C | 97.79 mm |
| December | 1.9 °C | 13.7 °C | 98.81 mm |
| Annual | 11.8 °C | 24 °C | 1146.29 mm |
| 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 : -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 |