| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F | |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F | |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F | |
| Average First Frost Date: | Oct. 1 - Oct. 10 | |
| Average Last Frost Date: | May 11 - May 20 | |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate | |
| Ecoregion: | 43c - River Breaks | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 57501 - Pierre, SD | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 7 | 13 | 23 | 34 | 46 | 56 | 62 | 60 | 49 | 37 | 23 | 12 | 35 |
| Avg Max Temp (°F) | 27 | 34 | 45 | 59 | 71 | 81 | 89 | 88 | 77 | 62 | 43 | 31 | 59 |
| Avg Precip (In.) | .47 | .53 | 1.14 | 1.96 | 3.03 | 3.34 | 2.68 | 1.8 | 1.49 | 1.56 | .64 | .44 | 19.08 |