| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F | |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F 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 1 - May 10 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 46n - James River Lowland | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 57069 - Vermillion, SD | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 8 | 14 | 25 | 36 | 48 | 58 | 63 | 61 | 51 | 38 | 25 | 12 | 37 |
| Avg Max Temp (°F) | 30 | 37 | 49 | 63 | 75 | 84 | 88 | 86 | 79 | 66 | 46 | 33 | 61 |
| Avg Precip (In.) | .39 | .51 | 1.83 | 2.75 | 3.78 | 3.73 | 3.36 | 2.94 | 2.41 | 1.96 | 1.46 | .54 | 25.64 |