Wallace, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.7 °F (low) to 61.9 °F (high). Annual precipitation averages 42.9 Inches. Wallace is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.3 °F | 34.4 °F | 2.78 in. |
| February | 21.1 °F | 38.8 °F | 2.38 in. |
| March | 30.2 °F | 50.0 °F | 3.1 in. |
| April | 40.7 °F | 62.7 °F | 4.44 in. |
| May | 51.9 °F | 73.5 °F | 4.67 in. |
| June | 61.0 °F | 81.8 °F | 5.04 in. |
| July | 63.6 °F | 84.4 °F | 4.33 in. |
| August | 61.3 °F | 83.1 °F | 3.46 in. |
| September | 53.7 °F | 78.2 °F | 3.13 in. |
| October | 42.6 °F | 66.0 °F | 3.37 in. |
| November | 32.4 °F | 51.1 °F | 3.45 in. |
| December | 23.8 °F | 39.1 °F | 2.79 in. |
| Annual | 41.7 °F | 61.9 °F | 42.94 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |