Leavenworth, Indiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 44.2 °F (low) to 66.8 °F (high). Annual precipitation averages 52.1 Inches. Leavenworth is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.2 °F | 42.1 °F | 3.83 in. |
| February | 25.8 °F | 46.8 °F | 3.67 in. |
| March | 33.2 °F | 56.4 °F | 4.9 in. |
| April | 42.9 °F | 68.0 °F | 5.22 in. |
| May | 53.1 °F | 76.5 °F | 5.71 in. |
| June | 61.7 °F | 84.1 °F | 4.93 in. |
| July | 65.4 °F | 87.1 °F | 4.54 in. |
| August | 63.3 °F | 86.5 °F | 3.18 in. |
| September | 55.9 °F | 81.0 °F | 3.94 in. |
| October | 44.2 °F | 70.0 °F | 3.81 in. |
| November | 34.1 °F | 56.7 °F | 3.91 in. |
| December | 27.5 °F | 45.8 °F | 4.41 in. |
| Annual | 44.2 °F | 66.8 °F | 52.05 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 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 | Cfa - Humid Subtropical Climate |