Brandt, South Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 32.9 °F (low) to 52.8 °F (high). Annual precipitation averages 27.1 Inches. Brandt 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 | 3.2 °F | 21.3 °F | 0.68 in. |
| February | 7.1 °F | 25.7 °F | 0.76 in. |
| March | 19.1 °F | 37.9 °F | 1.41 in. |
| April | 31.6 °F | 53.2 °F | 2.66 in. |
| May | 44.7 °F | 66.1 °F | 3.48 in. |
| June | 55.4 °F | 75.6 °F | 4.34 in. |
| July | 60.0 °F | 80.8 °F | 3.43 in. |
| August | 57.7 °F | 78.7 °F | 3.16 in. |
| September | 48.9 °F | 70.9 °F | 2.9 in. |
| October | 35.3 °F | 57.0 °F | 2.27 in. |
| November | 21.9 °F | 40.3 °F | 1.12 in. |
| December | 9.7 °F | 26.5 °F | 0.91 in. |
| Annual | 32.9 °F | 52.8 °F | 27.12 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 | Dfb - Humid Continental Mild Summer, Wet All Year |