Bullhead, South Dakota has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 0.3 °C (low) to 13.4 °C (high). Annual precipitation averages 441.2 Millimeters. 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 | -15.3 °C | -4.2 °C | 10.16 mm |
| February | -13.1 °C | -1.6 °C | 12.7 mm |
| March | -6.9 °C | 5.4 °C | 19.3 mm |
| April | -0.5 °C | 13.6 °C | 35.05 mm |
| May | 6.2 °C | 20.3 °C | 66.29 mm |
| June | 12.1 °C | 25.7 °C | 80.26 mm |
| July | 15.1 °C | 29.7 °C | 69.34 mm |
| August | 13.9 °C | 29.3 °C | 47.75 mm |
| September | 8.7 °C | 23.8 °C | 37.59 mm |
| October | 1.2 °C | 14.8 °C | 38.1 mm |
| November | -6.2 °C | 5.7 °C | 12.7 mm |
| December | -12.1 °C | -1.5 °C | 11.94 mm |
| Annual | 0.3 °C | 13.4 °C | 441.18 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 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |