Wasta, South Dakota has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 1 °C (low) to 16.4 °C (high). Annual precipitation averages 454.4 Millimeters. Wasta is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.5 °C | 1.5 °C | 8.13 mm |
| February | -10.7 °C | 3.6 °C | 12.7 mm |
| March | -5.4 °C | 9.7 °C | 22.61 mm |
| April | 0.1 °C | 15.3 °C | 49.02 mm |
| May | 6.5 °C | 21.2 °C | 85.6 mm |
| June | 12.3 °C | 27.1 °C | 76.71 mm |
| July | 15.6 °C | 31.3 °C | 58.17 mm |
| August | 14.3 °C | 31.4 °C | 44.45 mm |
| September | 8.2 °C | 26.2 °C | 29.21 mm |
| October | 0.8 °C | 17.5 °C | 41.15 mm |
| November | -6.3 °C | 9.1 °C | 15.24 mm |
| December | -11.4 °C | 2.5 °C | 11.43 mm |
| Annual | 1 °C | 16.4 °C | 454.42 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |