| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°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 11 - May 20 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 43c - River Breaks | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 57325 - Chamberlain, SD | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 7 | 14 | 24 | 36 | 48 | 58 | 63 | 61 | 51 | 39 | 24 | 13 | 37 |
| Avg Max Temp (°F) | 28 | 37 | 47 | 61 | 74 | 83 | 90 | 88 | 78 | 65 | 45 | 33 | 61 |
| Avg Precip (In.) | .41 | .53 | 1.45 | 2.36 | 3.46 | 3.2 | 2.85 | 2.11 | 1.91 | 1.68 | .82 | .41 | 21.2 |