| 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 3b: -35°F to -30°F Zone 4b: -25°F to -20°F Zone 5a: -20°F to -15°F Zone 4a: -30°F to -25°F | |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F | |
| Average First Frost Date: | Sep.1 - Sep. 10 | |
| Average Last Frost Date: | Jun. 21 - Jun. 30 | |
| 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 57745 - Hill City, SD | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 11 | 15 | 20 | 27 | 37 | 46 | 52 | 51 | 42 | 32 | 20 | 14 | 31 |
| Avg Max Temp (°F) | 34 | 38 | 43 | 51 | 61 | 72 | 79 | 78 | 69 | 57 | 42 | 36 | 55 |
| Avg Precip (In.) | .36 | .54 | 1.06 | 2.37 | 3.62 | 3.61 | 3.36 | 2.14 | 1.48 | 1.48 | .7 | .46 | 21.19 |