Wallace, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.4 °C (low) to 16.6 °C (high). Annual precipitation averages 1090.7 Millimeters. 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 | -7.6 °C | 1.3 °C | 70.61 mm |
| February | -6.1 °C | 3.8 °C | 60.45 mm |
| March | -1 °C | 10 °C | 78.74 mm |
| April | 4.8 °C | 17.1 °C | 112.78 mm |
| May | 11.1 °C | 23.1 °C | 118.62 mm |
| June | 16.1 °C | 27.7 °C | 128.02 mm |
| July | 17.6 °C | 29.1 °C | 109.98 mm |
| August | 16.3 °C | 28.4 °C | 87.88 mm |
| September | 12.1 °C | 25.7 °C | 79.5 mm |
| October | 5.9 °C | 18.9 °C | 85.6 mm |
| November | 0.2 °C | 10.6 °C | 87.63 mm |
| December | -4.6 °C | 3.9 °C | 70.87 mm |
| Annual | 5.4 °C | 16.6 °C | 1090.68 mm |
| 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 : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |