Hot Springs, South Dakota has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 1.2 °C (low) to 16.8 °C (high). Annual precipitation averages 479.5 Millimeters. Hot Springs is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.2 °C | 3.7 °C | 10.41 mm |
| February | -9.4 °C | 5.3 °C | 14.48 mm |
| March | -4.7 °C | 10.8 °C | 27.94 mm |
| April | -0.2 °C | 15.3 °C | 54.86 mm |
| May | 5.7 °C | 20.3 °C | 86.87 mm |
| June | 11.1 °C | 26.6 °C | 76.45 mm |
| July | 14.7 °C | 31.3 °C | 63.5 mm |
| August | 13.4 °C | 30.8 °C | 50.29 mm |
| September | 7.9 °C | 26.1 °C | 35.81 mm |
| October | 1.1 °C | 17.6 °C | 35.81 mm |
| November | -5.1 °C | 9.7 °C | 11.43 mm |
| December | -9.5 °C | 4.1 °C | 11.68 mm |
| Annual | 1.2 °C | 16.8 °C | 479.53 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |