| 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 5b: -15°F to -10°F Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F | |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F | |
| Average First Frost Date: | Sep. 21 - Sep. 30 | |
| Average Last Frost Date: | May 21 - May 31 | |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate | |
| Ecoregion: | 17a - Black Hills Plateau | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 57702 - Rapid City, SD | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 10 | 15 | 21 | 31 | 42 | 51 | 57 | 55 | 44 | 34 | 21 | 13 | 33 |
| Avg Max Temp (°F) | 34 | 39 | 46 | 55 | 65 | 76 | 83 | 83 | 73 | 61 | 44 | 37 | 58 |
| Avg Precip (In.) | .33 | .42 | .97 | 2.04 | 3.4 | 3.09 | 2.61 | 2 | 1.24 | 1.54 | .56 | .35 | 18.56 |