Wasta, South Dakota has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 33.7 °F (low) to 61.5 °F (high). Annual precipitation averages 17.9 Inches. 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 | 9.5 °F | 34.7 °F | 0.32 in. |
| February | 12.8 °F | 38.5 °F | 0.5 in. |
| March | 22.2 °F | 49.5 °F | 0.89 in. |
| April | 32.1 °F | 59.5 °F | 1.93 in. |
| May | 43.7 °F | 70.1 °F | 3.37 in. |
| June | 54.1 °F | 80.7 °F | 3.02 in. |
| July | 60.1 °F | 88.3 °F | 2.29 in. |
| August | 57.8 °F | 88.5 °F | 1.75 in. |
| September | 46.8 °F | 79.2 °F | 1.15 in. |
| October | 33.4 °F | 63.5 °F | 1.62 in. |
| November | 20.7 °F | 48.4 °F | 0.6 in. |
| December | 11.4 °F | 36.5 °F | 0.45 in. |
| Annual | 33.7 °F | 61.5 °F | 17.89 in. |
| 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 : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |