| 2023 Hardiness Zone: | Zone 4b: -25°F to -20°F | |
| 2012 Hardiness Zone: | Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°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: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 46c - Glacial Lake Basins | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 57469 - Redfield, SD | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 2 | 11 | 22 | 34 | 45 | 55 | 60 | 58 | 47 | 36 | 21 | 9 | 33 |
| Avg Max Temp (°F) | 22 | 31 | 42 | 59 | 72 | 81 | 87 | 86 | 75 | 62 | 41 | 29 | 57 |
| Avg Precip (In.) | .39 | .53 | 1.24 | 1.98 | 2.94 | 3.19 | 2.93 | 2.43 | 1.85 | 1.65 | .66 | .34 | 20.13 |