| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F | |
| 2012 Hardiness Zone: | Zone 4b: -25°F to -20°F | |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F | |
| 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: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 57767 - Owanka, SD | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 8 | 13 | 22 | 33 | 44 | 53 | 59 | 57 | 46 | 34 | 21 | 11 | 33 |
| Avg Max Temp (°F) | 32 | 39 | 48 | 59 | 70 | 80 | 88 | 87 | 77 | 63 | 45 | 36 | 60 |
| Avg Precip (In.) | .37 | .5 | 1.07 | 1.95 | 3.06 | 2.81 | 2.21 | 1.66 | 1.15 | 1.54 | .67 | .39 | 17.38 |