Huron, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 1.4 °C (low) to 13.9 °C (high). Annual precipitation averages 598.2 Millimeters. Huron 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 | -14.6 °C | -3.8 °C | 14.48 mm |
| February | -12.3 °C | -0.7 °C | 17.27 mm |
| March | -5.9 °C | 6.1 °C | 22.61 mm |
| April | 0.7 °C | 14.1 °C | 57.4 mm |
| May | 7.8 °C | 20.8 °C | 83.06 mm |
| June | 13.9 °C | 26.4 °C | 100.84 mm |
| July | 16.6 °C | 29.6 °C | 81.53 mm |
| August | 15.1 °C | 28.6 °C | 64.52 mm |
| September | 9.8 °C | 24.2 °C | 63.25 mm |
| October | 2.1 °C | 15.9 °C | 57.4 mm |
| November | -5.3 °C | 6.7 °C | 20.32 mm |
| December | -11.5 °C | -0.9 °C | 15.49 mm |
| Annual | 1.4 °C | 13.9 °C | 598.17 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 |