Greendale, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.4 °F (low) to 65 °F (high). Annual precipitation averages 45.6 Inches. Greendale 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 | 23.3 °F | 39.7 °F | 3.39 in. |
| February | 25.3 °F | 43.8 °F | 2.84 in. |
| March | 32.9 °F | 53.5 °F | 4.0 in. |
| April | 42.7 °F | 66.0 °F | 4.78 in. |
| May | 53.2 °F | 74.9 °F | 4.93 in. |
| June | 61.9 °F | 83.4 °F | 4.62 in. |
| July | 65.8 °F | 86.8 °F | 4.0 in. |
| August | 64.7 °F | 86.1 °F | 3.35 in. |
| September | 56.4 °F | 80.0 °F | 3.23 in. |
| October | 43.9 °F | 67.7 °F | 3.3 in. |
| November | 34.2 °F | 54.6 °F | 3.41 in. |
| December | 28.2 °F | 43.9 °F | 3.71 in. |
| Annual | 44.4 °F | 65 °F | 45.56 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 |