Bushnell, South Dakota has a Humid Continental Mild Summer With Dry Winters climate (Köppen classification: Dwb). Average annual temperatures range from 0.9 °C (low) to 12.1 °C (high). Annual precipitation averages 675.2 Millimeters. Bushnell is located in USDA Plant Hardiness Zone 4b. 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 | -15.2 °C | -5.2 °C | 14.48 mm |
| February | -13.1 °C | -2.7 °C | 16.26 mm |
| March | -6.6 °C | 4.1 °C | 32.77 mm |
| April | 0.2 °C | 12.3 °C | 63.25 mm |
| May | 7.4 °C | 19.3 °C | 90.42 mm |
| June | 13.6 °C | 24.9 °C | 109.73 mm |
| July | 15.8 °C | 27.4 °C | 89.66 mm |
| August | 14.3 °C | 26.2 °C | 82.3 mm |
| September | 9.4 °C | 22.2 °C | 77.22 mm |
| October | 1.9 °C | 14.3 °C | 53.59 mm |
| November | -5.4 °C | 5.2 °C | 25.4 mm |
| December | -11.8 °C | -2.4 °C | 20.07 mm |
| Annual | 0.9 °C | 12.1 °C | 675.15 mm |
| 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 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dwb - Humid Continental Mild Summer With Dry Winters |