Viborg, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 36.2 °F (low) to 58 °F (high). Annual precipitation averages 27.4 Inches. 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 | 8.4 °F | 27.6 °F | 0.55 in. |
| February | 12.5 °F | 32.5 °F | 0.73 in. |
| March | 23.6 °F | 44.9 °F | 1.42 in. |
| April | 35.0 °F | 58.6 °F | 2.9 in. |
| May | 47.5 °F | 70.3 °F | 3.88 in. |
| June | 58.7 °F | 80.5 °F | 4.27 in. |
| July | 62.7 °F | 84.7 °F | 3.13 in. |
| August | 60.2 °F | 82.2 °F | 3.19 in. |
| September | 51.0 °F | 75.5 °F | 2.93 in. |
| October | 37.5 °F | 61.7 °F | 2.39 in. |
| November | 24.1 °F | 45.3 °F | 1.17 in. |
| December | 13.3 °F | 31.6 °F | 0.81 in. |
| Annual | 36.2 °F | 58 °F | 27.37 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 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |