Bancroft, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 0.9 °C (low) to 13 °C (high). Annual precipitation averages 618.2 Millimeters. Bancroft 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 | -15.3 °C | -4.7 °C | 13.97 mm |
| February | -12.9 °C | -1.8 °C | 16.76 mm |
| March | -6.4 °C | 5.1 °C | 26.92 mm |
| April | 0.3 °C | 13.4 °C | 61.21 mm |
| May | 7.3 °C | 20.2 °C | 82.8 mm |
| June | 13.4 °C | 25.7 °C | 102.11 mm |
| July | 15.9 °C | 28.6 °C | 83.82 mm |
| August | 14.6 °C | 27.5 °C | 73.41 mm |
| September | 9.6 °C | 23.2 °C | 65.53 mm |
| October | 1.9 °C | 15.1 °C | 53.85 mm |
| November | -5.6 °C | 5.8 °C | 20.83 mm |
| December | -12.1 °C | -1.9 °C | 17.02 mm |
| Annual | 0.9 °C | 13 °C | 618.23 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 | Dfa - Humid Continental Hot Summers With Year Around Precipitation |