Bonesteel, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.3 °C (low) to 15 °C (high). Annual precipitation averages 691.4 Millimeters. Bonesteel 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 Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.9 °C | -0.5 °C | 10.16 mm |
| February | -10 °C | 2 °C | 18.29 mm |
| March | -4.9 °C | 8.2 °C | 32 mm |
| April | 1.2 °C | 14.1 °C | 85.34 mm |
| May | 7.5 °C | 20.6 °C | 107.7 mm |
| June | 13.7 °C | 26.2 °C | 111.25 mm |
| July | 16.9 °C | 30.2 °C | 81.79 mm |
| August | 15.6 °C | 28.9 °C | 78.74 mm |
| September | 10.3 °C | 24.3 °C | 79.5 mm |
| October | 2.7 °C | 16.3 °C | 51.31 mm |
| November | -4.2 °C | 8.1 °C | 20.57 mm |
| December | -9.7 °C | 1.2 °C | 14.73 mm |
| Annual | 2.3 °C | 15 °C | 691.38 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 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |