Wallace, Kansas has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 3.2 °C (low) to 19.7 °C (high). Annual precipitation averages 485.2 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 | -8.8 °C | 6.7 °C | 8.64 mm |
| February | -7.5 °C | 8.4 °C | 12.45 mm |
| March | -3.2 °C | 13.9 °C | 22.61 mm |
| April | 1.6 °C | 18.8 °C | 41.4 mm |
| May | 7.9 °C | 24.1 °C | 68.07 mm |
| June | 14 °C | 30.4 °C | 67.31 mm |
| July | 17.1 °C | 33.4 °C | 89.41 mm |
| August | 15.9 °C | 32 °C | 74.68 mm |
| September | 10.7 °C | 27.9 °C | 38.35 mm |
| October | 2.8 °C | 20.6 °C | 35.56 mm |
| November | -3.7 °C | 12.8 °C | 13.72 mm |
| December | -8.2 °C | 7.2 °C | 12.95 mm |
| Annual | 3.2 °C | 19.7 °C | 485.15 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |