Wanblee, South Dakota has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 35.2 °F (low) to 61.5 °F (high). Annual precipitation averages 20 Inches. 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 | 12.5 °F | 35.5 °F | 0.46 in. |
| February | 15.0 °F | 39.1 °F | 0.63 in. |
| March | 23.4 °F | 49.6 °F | 1.15 in. |
| April | 32.6 °F | 59.5 °F | 2.29 in. |
| May | 43.6 °F | 69.6 °F | 3.45 in. |
| June | 54.1 °F | 80.2 °F | 3.35 in. |
| July | 60.5 °F | 88.4 °F | 2.51 in. |
| August | 58.3 °F | 87.7 °F | 1.92 in. |
| September | 48.6 °F | 79.1 °F | 1.43 in. |
| October | 35.5 °F | 63.3 °F | 1.66 in. |
| November | 23.3 °F | 48.5 °F | 0.62 in. |
| December | 14.8 °F | 37.4 °F | 0.54 in. |
| Annual | 35.2 °F | 61.5 °F | 20.01 in. |
| 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 : -20°F to -15°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 |