Hanover, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.1 °F (low) to 64.2 °F (high). Annual precipitation averages 49.5 Inches. Hanover is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.7 °F | 38.9 °F | 3.58 in. |
| February | 25.0 °F | 43.2 °F | 3.3 in. |
| March | 33.0 °F | 53.5 °F | 4.21 in. |
| April | 43.3 °F | 65.2 °F | 5.05 in. |
| May | 53.6 °F | 74.1 °F | 5.37 in. |
| June | 61.7 °F | 82.2 °F | 4.83 in. |
| July | 65.1 °F | 85.1 °F | 4.52 in. |
| August | 63.6 °F | 84.3 °F | 3.92 in. |
| September | 56.0 °F | 78.9 °F | 3.44 in. |
| October | 44.2 °F | 67.4 °F | 3.57 in. |
| November | 34.3 °F | 54.3 °F | 3.52 in. |
| December | 27.2 °F | 43.1 °F | 4.15 in. |
| Annual | 44.1 °F | 64.2 °F | 49.46 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 | Dfa - Humid Continental Hot Summers With Year Around Precipitation |