Lake City, South Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.5 °C (low) to 10.8 °C (high). Annual precipitation averages 633.7 Millimeters. Lake City is located in USDA Plant Hardiness Zone 4a. 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 | -16.8 °C | -6.7 °C | 16 mm |
| February | -14.8 °C | -4.1 °C | 16.51 mm |
| March | -8.3 °C | 2.4 °C | 25.91 mm |
| April | -0.5 °C | 10.6 °C | 52.83 mm |
| May | 7.1 °C | 18.1 °C | 78.49 mm |
| June | 13.4 °C | 23.7 °C | 111 mm |
| July | 16 °C | 26.4 °C | 102.87 mm |
| August | 15.2 °C | 25.8 °C | 68.07 mm |
| September | 10.2 °C | 21 °C | 64.26 mm |
| October | 2.5 °C | 12.7 °C | 58.42 mm |
| November | -5.4 °C | 3.7 °C | 20.07 mm |
| December | -12.7 °C | -3.7 °C | 19.3 mm |
| Annual | 0.5 °C | 10.8 °C | 633.73 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 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |