Bruce, South Dakota has a Humid Continental Mild Summer With Dry Winters climate (Köppen classification: Dwb). Average annual temperatures range from 0.6 °C (low) to 12.2 °C (high). Annual precipitation averages 661.7 Millimeters. Bruce 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 Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -15.5 °C | -5.2 °C | 14.73 mm |
| February | -13.5 °C | -2.6 °C | 15.24 mm |
| March | -6.8 °C | 4.2 °C | 31.5 mm |
| April | -0.1 °C | 12.3 °C | 62.48 mm |
| May | 7.2 °C | 19.4 °C | 88.9 mm |
| June | 13.5 °C | 24.9 °C | 107.95 mm |
| July | 15.7 °C | 27.6 °C | 88.39 mm |
| August | 13.9 °C | 26.3 °C | 77.47 mm |
| September | 9.1 °C | 22.2 °C | 74.42 mm |
| October | 1.4 °C | 14.3 °C | 56.13 mm |
| November | -5.8 °C | 5.3 °C | 24.64 mm |
| December | -12.2 °C | -2.3 °C | 19.81 mm |
| Annual | 0.6 °C | 12.2 °C | 661.66 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 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 |