Trenton, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.7 °C (low) to 23.3 °C (high). Annual precipitation averages 1099.1 Millimeters. Trenton is located in USDA Plant Hardiness Zone 8a. 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 | 0.4 °C | 11.9 °C | 69.09 mm |
| February | 2.2 °C | 14.2 °C | 80.26 mm |
| March | 6.3 °C | 18.4 °C | 100.33 mm |
| April | 10.7 °C | 22.7 °C | 96.27 mm |
| May | 16 °C | 26.7 °C | 133.35 mm |
| June | 20.7 °C | 31.3 °C | 99.31 mm |
| July | 22.9 °C | 34 °C | 65.79 mm |
| August | 22.6 °C | 34.2 °C | 68.33 mm |
| September | 18.6 °C | 30.4 °C | 85.6 mm |
| October | 12.4 °C | 24.7 °C | 121.16 mm |
| November | 6.4 °C | 18.2 °C | 87.38 mm |
| December | 1.7 °C | 13 °C | 92.2 mm |
| Annual | 11.7 °C | 23.3 °C | 1099.07 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 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 |