| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F | |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F | |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F | |
| Average First Frost Date: | Sep. 21 - Sep. 30 | |
| Average Last Frost Date: | May 21 - May 31 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 43e - Sagebrush Steppe | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 57735 - Edgemont, SD | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 9 | 14 | 22 | 31 | 41 | 50 | 57 | 54 | 43 | 32 | 20 | 11 | 32 |
| Avg Max Temp (°F) | 35 | 41 | 51 | 61 | 71 | 82 | 89 | 88 | 78 | 64 | 47 | 38 | 62 |
| Avg Precip (In.) | .36 | .46 | .91 | 1.89 | 2.9 | 2.66 | 2.3 | 1.58 | 1.35 | 1.24 | .62 | .39 | 16.67 |