| 2023 Hardiness Zone: | Zone 4b: -25°F to -20°F | |
| 2012 Hardiness Zone: | Zone 4b: -25°F to -20°F | |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F | |
| Average First Frost Date: | Oct. 1 - Oct. 10 | |
| Average Last Frost Date: | May 11 - May 20 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 46o - Minnesota River Prairie | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 57252 - Milbank, SD | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 0 | 7 | 20 | 33 | 45 | 55 | 59 | 57 | 47 | 34 | 20 | 6 | 32 |
| Avg Max Temp (°F) | 21 | 28 | 39 | 56 | 70 | 79 | 84 | 82 | 73 | 60 | 40 | 26 | 55 |
| Avg Precip (In.) | .54 | .45 | 1.37 | 2.13 | 2.52 | 3.48 | 3.44 | 2.67 | 1.93 | 2.11 | 1.12 | .41 | 22.17 |