Howard, 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 13.2 °C (high). Annual precipitation averages 631.7 Millimeters. Howard 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 | -14.4 °C | -4.2 °C | 14.73 mm |
| February | -12.1 °C | -1.2 °C | 16.51 mm |
| March | -5.9 °C | 5.6 °C | 31.24 mm |
| April | 0.8 °C | 13.7 °C | 67.82 mm |
| May | 7.7 °C | 20.2 °C | 89.92 mm |
| June | 13.8 °C | 25.7 °C | 95.5 mm |
| July | 16.2 °C | 28.7 °C | 75.44 mm |
| August | 14.9 °C | 27.3 °C | 72.9 mm |
| September | 10.1 °C | 23.2 °C | 71.88 mm |
| October | 2.4 °C | 15.3 °C | 55.88 mm |
| November | -5.2 °C | 6.1 °C | 22.61 mm |
| December | -11.5 °C | -1.6 °C | 17.27 mm |
| Annual | 1.4 °C | 13.2 °C | 631.7 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 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 | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |