Bancroft, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 33.6 °F (low) to 55.4 °F (high). Annual precipitation averages 24.3 Inches. 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 | 4.5 °F | 23.5 °F | 0.55 in. |
| February | 8.7 °F | 28.8 °F | 0.66 in. |
| March | 20.4 °F | 41.1 °F | 1.06 in. |
| April | 32.5 °F | 56.2 °F | 2.41 in. |
| May | 45.2 °F | 68.3 °F | 3.26 in. |
| June | 56.1 °F | 78.2 °F | 4.02 in. |
| July | 60.7 °F | 83.5 °F | 3.3 in. |
| August | 58.3 °F | 81.5 °F | 2.89 in. |
| September | 49.3 °F | 73.8 °F | 2.58 in. |
| October | 35.5 °F | 59.2 °F | 2.12 in. |
| November | 22.0 °F | 42.5 °F | 0.82 in. |
| December | 10.3 °F | 28.6 °F | 0.67 in. |
| Annual | 33.6 °F | 55.4 °F | 24.34 in. |
| 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 : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |