Parkston, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.3 °C (low) to 14.8 °C (high). Annual precipitation averages 644.7 Millimeters. Parkston is located in USDA Plant Hardiness Zone 5a. 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 | -12.9 °C | -2.2 °C | 13.72 mm |
| February | -10.7 °C | 0.8 °C | 20.07 mm |
| March | -4.9 °C | 7.3 °C | 29.97 mm |
| April | 1.4 °C | 14.9 °C | 74.93 mm |
| May | 8.4 °C | 21.5 °C | 93.22 mm |
| June | 14.6 °C | 27.3 °C | 93.73 mm |
| July | 17 °C | 30.2 °C | 76.71 mm |
| August | 15.7 °C | 28.9 °C | 74.93 mm |
| September | 10.6 °C | 24.9 °C | 70.61 mm |
| October | 2.9 °C | 16.7 °C | 54.36 mm |
| November | -4.5 °C | 7.5 °C | 24.13 mm |
| December | -10.4 °C | 0.1 °C | 18.29 mm |
| Annual | 2.3 °C | 14.8 °C | 644.67 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 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |