| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F | |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F | |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F | |
| Average First Frost Date: | Sep. 21 - Sep. 30 | |
| Average Last Frost Date: | May 11 - May 20 | |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate | |
| Ecoregion: | 43g - Semiarid Pierre Shale Plains | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 57703 - Rapid City, SD | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 11 | 15 | 22 | 32 | 43 | 52 | 58 | 56 | 46 | 34 | 22 | 13 | 34 |
| Avg Max Temp (°F) | 34 | 39 | 46 | 57 | 67 | 77 | 85 | 84 | 74 | 62 | 45 | 36 | 59 |
| Avg Precip (In.) | .36 | .45 | 1.01 | 1.93 | 3.08 | 2.94 | 2.27 | 1.74 | 1.18 | 1.47 | .6 | .41 | 17.45 |