| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F Zone 5b: -15°F to -10°F | |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F | |
| Average First Frost Date: | Sep.11 - Sep. 20 | |
| Average Last Frost Date: | Jun. 11 - Jun. 20 | |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate | |
| Ecoregion: | 17c - Black Hills Core Highlands | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 57732 - Deadwood, SD | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 12 | 15 | 21 | 29 | 39 | 48 | 54 | 53 | 43 | 33 | 21 | 14 | 32 |
| Avg Max Temp (°F) | 33 | 37 | 43 | 52 | 62 | 72 | 80 | 79 | 69 | 56 | 41 | 35 | 55 |
| Avg Precip (In.) | 1.2 | 1.13 | 2.22 | 3.45 | 4.26 | 3.82 | 2.65 | 2.02 | 1.67 | 2.2 | 1.39 | 1.29 | 27.29 |