Dell Rapids, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 34.7 °F (low) to 55.2 °F (high). Annual precipitation averages 27.7 Inches. Dell Rapids 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 | 5.9 °F | 24.2 °F | 0.6 in. |
| February | 10.0 °F | 28.9 °F | 0.81 in. |
| March | 21.7 °F | 41.3 °F | 1.38 in. |
| April | 33.5 °F | 55.8 °F | 2.9 in. |
| May | 46.5 °F | 68.0 °F | 3.69 in. |
| June | 57.6 °F | 77.8 °F | 4.3 in. |
| July | 61.6 °F | 82.3 °F | 3.41 in. |
| August | 58.8 °F | 80.0 °F | 3.4 in. |
| September | 49.9 °F | 73.2 °F | 3.04 in. |
| October | 36.3 °F | 59.3 °F | 2.16 in. |
| November | 22.8 °F | 42.9 °F | 1.12 in. |
| December | 11.5 °F | 28.9 °F | 0.89 in. |
| Annual | 34.7 °F | 55.2 °F | 27.7 in. |
| 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 : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |