Trenton, Utah has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33.5 °F (low) to 60.2 °F (high). Annual precipitation averages 17.1 Inches. Trenton is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.1 °F | 32.3 °F | 1.73 in. |
| February | 17.6 °F | 37.3 °F | 1.52 in. |
| March | 27.2 °F | 49.5 °F | 1.64 in. |
| April | 33.3 °F | 58.6 °F | 1.89 in. |
| May | 40.6 °F | 68.2 °F | 2.32 in. |
| June | 47.0 °F | 79.1 °F | 1.18 in. |
| July | 53.7 °F | 89.2 °F | 0.61 in. |
| August | 52.1 °F | 87.8 °F | 0.81 in. |
| September | 43.3 °F | 77.5 °F | 1.27 in. |
| October | 33.1 °F | 62.7 °F | 1.45 in. |
| November | 24.3 °F | 46.9 °F | 1.19 in. |
| December | 15.9 °F | 33.7 °F | 1.5 in. |
| Annual | 33.5 °F | 60.2 °F | 17.11 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |