Big Stone City, South Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33.3 °F (low) to 54.1 °F (high). Annual precipitation averages 25.1 Inches. Big Stone City is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.1 °F | 21.8 °F | 0.66 in. |
| February | 6.3 °F | 26.0 °F | 0.66 in. |
| March | 19.3 °F | 38.5 °F | 1.16 in. |
| April | 32.5 °F | 54.7 °F | 2.45 in. |
| May | 45.9 °F | 68.1 °F | 2.85 in. |
| June | 57.1 °F | 78.0 °F | 3.83 in. |
| July | 60.7 °F | 82.0 °F | 3.98 in. |
| August | 57.8 °F | 80.2 °F | 3.16 in. |
| September | 48.7 °F | 73.0 °F | 2.45 in. |
| October | 35.7 °F | 58.0 °F | 2.24 in. |
| November | 22.6 °F | 41.9 °F | 0.97 in. |
| December | 10.2 °F | 27.4 °F | 0.67 in. |
| Annual | 33.3 °F | 54.1 °F | 25.08 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 |