Kennebec, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 1.8 °C (low) to 15.9 °C (high). Annual precipitation averages 531.6 Millimeters. Kennebec 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 Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.9 °C | -0.8 °C | 11.94 mm |
| February | -10.8 °C | 1.9 °C | 14.22 mm |
| March | -5.4 °C | 8.6 °C | 24.38 mm |
| April | 0.6 °C | 15.8 °C | 59.44 mm |
| May | 7.4 °C | 21.8 °C | 84.33 mm |
| June | 13.4 °C | 27.4 °C | 89.66 mm |
| July | 16.6 °C | 31.7 °C | 70.1 mm |
| August | 15.3 °C | 30.7 °C | 57.91 mm |
| September | 10 °C | 26.3 °C | 45.97 mm |
| October | 2.4 °C | 17.5 °C | 42.16 mm |
| November | -5 °C | 8.2 °C | 18.8 mm |
| December | -10.6 °C | 1.1 °C | 12.7 mm |
| Annual | 1.8 °C | 15.9 °C | 531.61 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |