Bullhead, South Dakota has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 32.5 °F (low) to 56.1 °F (high). Annual precipitation averages 17.4 Inches. Bullhead is located in USDA Plant Hardiness Zone 4a. 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 | 4.5 °F | 24.5 °F | 0.4 in. |
| February | 8.4 °F | 29.1 °F | 0.5 in. |
| March | 19.5 °F | 41.7 °F | 0.76 in. |
| April | 31.1 °F | 56.4 °F | 1.38 in. |
| May | 43.1 °F | 68.5 °F | 2.61 in. |
| June | 53.8 °F | 78.3 °F | 3.16 in. |
| July | 59.1 °F | 85.4 °F | 2.73 in. |
| August | 57.1 °F | 84.7 °F | 1.88 in. |
| September | 47.6 °F | 74.9 °F | 1.48 in. |
| October | 34.2 °F | 58.6 °F | 1.5 in. |
| November | 20.9 °F | 42.2 °F | 0.5 in. |
| December | 10.2 °F | 29.3 °F | 0.47 in. |
| Annual | 32.5 °F | 56.1 °F | 17.37 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 4a : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |