Kennebec, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 35.2 °F (low) to 60.5 °F (high). Annual precipitation averages 20.9 Inches. 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 | 8.8 °F | 30.6 °F | 0.47 in. |
| February | 12.6 °F | 35.4 °F | 0.56 in. |
| March | 22.3 °F | 47.4 °F | 0.96 in. |
| April | 33.1 °F | 60.5 °F | 2.34 in. |
| May | 45.3 °F | 71.2 °F | 3.32 in. |
| June | 56.2 °F | 81.4 °F | 3.53 in. |
| July | 61.8 °F | 89.0 °F | 2.76 in. |
| August | 59.5 °F | 87.3 °F | 2.28 in. |
| September | 50.0 °F | 79.3 °F | 1.81 in. |
| October | 36.3 °F | 63.5 °F | 1.66 in. |
| November | 23.0 °F | 46.8 °F | 0.74 in. |
| December | 13.0 °F | 34.0 °F | 0.5 in. |
| Annual | 35.2 °F | 60.5 °F | 20.93 in. |
| 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 : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |