Stockholm, South Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.2 °C (low) to 11.9 °C (high). Annual precipitation averages 653.3 Millimeters. Stockholm 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 | -16.3 °C | -6.1 °C | 17.27 mm |
| February | -14.3 °C | -3.5 °C | 17.78 mm |
| March | -7.4 °C | 3.4 °C | 31.24 mm |
| April | -0.4 °C | 12.1 °C | 63.25 mm |
| May | 6.8 °C | 19.3 °C | 78.49 mm |
| June | 12.8 °C | 24.8 °C | 100.84 mm |
| July | 15.2 °C | 27.7 °C | 97.03 mm |
| August | 13.9 °C | 26.6 °C | 75.69 mm |
| September | 9 °C | 22.3 °C | 67.31 mm |
| October | 1.6 °C | 14 °C | 59.69 mm |
| November | -5.8 °C | 4.7 °C | 24.89 mm |
| December | -12.6 °C | -3.1 °C | 19.81 mm |
| Annual | 0.2 °C | 11.9 °C | 653.29 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 | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |