Eden, South Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 32.8 °F (low) to 51.8 °F (high). Annual precipitation averages 24.7 Inches. 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 | 1.9 °F | 20.0 °F | 0.64 in. |
| February | 5.4 °F | 24.7 °F | 0.65 in. |
| March | 17.3 °F | 36.7 °F | 1.03 in. |
| April | 31.1 °F | 51.6 °F | 2.13 in. |
| May | 44.7 °F | 65.1 °F | 3.05 in. |
| June | 55.9 °F | 75.0 °F | 4.21 in. |
| July | 60.6 °F | 79.9 °F | 4.0 in. |
| August | 59.0 °F | 78.7 °F | 2.63 in. |
| September | 50.2 °F | 70.3 °F | 2.5 in. |
| October | 36.4 °F | 55.3 °F | 2.3 in. |
| November | 22.2 °F | 38.8 °F | 0.8 in. |
| December | 9.2 °F | 25.3 °F | 0.76 in. |
| Annual | 32.8 °F | 51.8 °F | 24.7 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 4a : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |