Hitchcock, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 0.8 °C (low) to 13.4 °C (high). Annual precipitation averages 596.7 Millimeters. Hitchcock is located in USDA Plant Hardiness Zone 4b. 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 | -15.4 °C | -4.5 °C | 13.72 mm |
| February | -13.1 °C | -1.4 °C | 17.78 mm |
| March | -6.5 °C | 5.5 °C | 25.4 mm |
| April | 0.2 °C | 13.7 °C | 61.21 mm |
| May | 7.3 °C | 20.6 °C | 85.6 mm |
| June | 13.4 °C | 26.1 °C | 96.27 mm |
| July | 16.1 °C | 29.2 °C | 82.55 mm |
| August | 14.6 °C | 28.2 °C | 68.83 mm |
| September | 9.2 °C | 23.8 °C | 59.18 mm |
| October | 1.6 °C | 15.3 °C | 51.31 mm |
| November | -5.9 °C | 6.2 °C | 18.54 mm |
| December | -12.2 °C | -1.7 °C | 16.26 mm |
| Annual | 0.8 °C | 13.4 °C | 596.65 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 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |