Trenton, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.6 °C (low) to 23.8 °C (high). Annual precipitation averages 1191.8 Millimeters. Trenton 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 Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.8 °C | 13.1 °C | 106.17 mm |
| February | 1.8 °C | 15.1 °C | 94.49 mm |
| March | 5.2 °C | 19.3 °C | 111.76 mm |
| April | 9.7 °C | 24.1 °C | 82.04 mm |
| May | 14.6 °C | 28.3 °C | 79.25 mm |
| June | 18.8 °C | 31.9 °C | 120.14 mm |
| July | 20.7 °C | 33.6 °C | 109.73 mm |
| August | 20.1 °C | 32.7 °C | 122.43 mm |
| September | 17.2 °C | 29.4 °C | 99.31 mm |
| October | 10.6 °C | 24.6 °C | 76.96 mm |
| November | 5.1 °C | 18.7 °C | 83.57 mm |
| December | 2.2 °C | 14.2 °C | 105.92 mm |
| Annual | 10.6 °C | 23.8 °C | 1191.77 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |