Wanblee, South Dakota has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 1.8 °C (low) to 16.4 °C (high). Annual precipitation averages 508.3 Millimeters. Wanblee is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.8 °C | 1.9 °C | 11.68 mm |
| February | -9.4 °C | 3.9 °C | 16 mm |
| March | -4.8 °C | 9.8 °C | 29.21 mm |
| April | 0.3 °C | 15.3 °C | 58.17 mm |
| May | 6.4 °C | 20.9 °C | 87.63 mm |
| June | 12.3 °C | 26.8 °C | 85.09 mm |
| July | 15.8 °C | 31.3 °C | 63.75 mm |
| August | 14.6 °C | 30.9 °C | 48.77 mm |
| September | 9.2 °C | 26.2 °C | 36.32 mm |
| October | 1.9 °C | 17.4 °C | 42.16 mm |
| November | -4.8 °C | 9.2 °C | 15.75 mm |
| December | -9.6 °C | 3 °C | 13.72 mm |
| Annual | 1.8 °C | 16.4 °C | 508.25 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°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 |