Eden, South Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.5 °C (low) to 11 °C (high). Annual precipitation averages 627.4 Millimeters. Eden is located in USDA Plant Hardiness Zone 4a. 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 | -16.7 °C | -6.7 °C | 16.26 mm |
| February | -14.8 °C | -4.1 °C | 16.51 mm |
| March | -8.2 °C | 2.6 °C | 26.16 mm |
| April | -0.5 °C | 10.9 °C | 54.1 mm |
| May | 7.1 °C | 18.4 °C | 77.47 mm |
| June | 13.3 °C | 23.9 °C | 106.93 mm |
| July | 15.9 °C | 26.6 °C | 101.6 mm |
| August | 15 °C | 25.9 °C | 66.8 mm |
| September | 10.1 °C | 21.3 °C | 63.5 mm |
| October | 2.4 °C | 12.9 °C | 58.42 mm |
| November | -5.4 °C | 3.8 °C | 20.32 mm |
| December | -12.7 °C | -3.7 °C | 19.3 mm |
| Annual | 0.5 °C | 11 °C | 627.37 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 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |