New Trenton, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.5 °F (low) to 64.2 °F (high). Annual precipitation averages 45.1 Inches. New Trenton is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.3 °F | 39.0 °F | 3.36 in. |
| February | 24.1 °F | 42.9 °F | 2.76 in. |
| March | 32.1 °F | 52.9 °F | 3.84 in. |
| April | 42.0 °F | 65.1 °F | 4.71 in. |
| May | 52.7 °F | 74.4 °F | 5.02 in. |
| June | 61.5 °F | 82.4 °F | 4.69 in. |
| July | 64.7 °F | 85.4 °F | 4.03 in. |
| August | 63.4 °F | 85.2 °F | 3.29 in. |
| September | 55.3 °F | 79.1 °F | 3.11 in. |
| October | 43.4 °F | 67.0 °F | 3.29 in. |
| November | 33.5 °F | 54.1 °F | 3.33 in. |
| December | 27.0 °F | 42.9 °F | 3.64 in. |
| Annual | 43.5 °F | 64.2 °F | 45.07 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |