Wynnedale, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44 °F (low) to 62.4 °F (high). Annual precipitation averages 43.6 Inches. Wynnedale 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 | 20.4 °F | 35.7 °F | 2.99 in. |
| February | 23.2 °F | 39.7 °F | 2.46 in. |
| March | 31.9 °F | 50.5 °F | 3.29 in. |
| April | 42.8 °F | 63.4 °F | 4.4 in. |
| May | 53.8 °F | 73.2 °F | 4.78 in. |
| June | 62.8 °F | 81.7 °F | 5.16 in. |
| July | 66.0 °F | 84.9 °F | 4.38 in. |
| August | 64.5 °F | 83.8 °F | 3.18 in. |
| September | 56.9 °F | 78.2 °F | 3.34 in. |
| October | 45.2 °F | 65.8 °F | 3.23 in. |
| November | 34.5 °F | 51.7 °F | 3.43 in. |
| December | 25.8 °F | 40.1 °F | 2.99 in. |
| Annual | 44 °F | 62.4 °F | 43.63 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 |