| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F | |
| 2012 Hardiness Zone: | Zone 4b: -25°F to -20°F | |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F | |
| Average First Frost Date: | Oct. 1 - Oct. 10 | |
| Average Last Frost Date: | May 11 - May 20 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 46n - James River Lowland | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 57108 - Sioux Falls, SD | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 4 | 11 | 22 | 34 | 46 | 56 | 61 | 59 | 48 | 36 | 22 | 9 | 34 |
| Avg Max Temp (°F) | 25 | 31 | 44 | 59 | 71 | 81 | 85 | 83 | 74 | 62 | 42 | 29 | 57 |
| Avg Precip (In.) | .53 | .53 | 1.75 | 2.66 | 3.3 | 3.6 | 3.04 | 3.1 | 2.52 | 1.92 | 1.39 | .56 | 24.89 |