Viborg, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.4 °C (low) to 14.4 °C (high). Annual precipitation averages 695.2 Millimeters. Viborg is located in USDA Plant Hardiness Zone 5a. 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 | -13.1 °C | -2.4 °C | 13.97 mm |
| February | -10.8 °C | 0.3 °C | 18.54 mm |
| March | -4.7 °C | 7.2 °C | 36.07 mm |
| April | 1.7 °C | 14.8 °C | 73.66 mm |
| May | 8.6 °C | 21.3 °C | 98.55 mm |
| June | 14.8 °C | 26.9 °C | 108.46 mm |
| July | 17.1 °C | 29.3 °C | 79.5 mm |
| August | 15.7 °C | 27.9 °C | 81.03 mm |
| September | 10.6 °C | 24.2 °C | 74.42 mm |
| October | 3.1 °C | 16.5 °C | 60.71 mm |
| November | -4.4 °C | 7.4 °C | 29.72 mm |
| December | -10.4 °C | -0.2 °C | 20.57 mm |
| Annual | 2.4 °C | 14.4 °C | 695.2 mm |
| 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 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |