Bison, South Dakota has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 32.6 °F (low) to 57.2 °F (high). Annual precipitation averages 18.5 Inches. Bison is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 8.8 °F | 28.7 °F | 0.46 in. |
| February | 11.9 °F | 32.4 °F | 0.59 in. |
| March | 20.6 °F | 43.5 °F | 0.88 in. |
| April | 30.4 °F | 56.2 °F | 1.72 in. |
| May | 41.7 °F | 67.0 °F | 3.13 in. |
| June | 51.7 °F | 77.2 °F | 3.37 in. |
| July | 57.7 °F | 85.5 °F | 2.63 in. |
| August | 55.7 °F | 85.1 °F | 1.85 in. |
| September | 46.3 °F | 76.0 °F | 1.38 in. |
| October | 33.5 °F | 59.3 °F | 1.48 in. |
| November | 21.3 °F | 43.4 °F | 0.54 in. |
| December | 11.8 °F | 31.5 °F | 0.47 in. |
| Annual | 32.6 °F | 57.2 °F | 18.5 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Normal |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |