| 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: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 46k - Prairie Coteau | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 57274 - Webster, SD | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 0 | 8 | 19 | 33 | 46 | 55 | 60 | 59 | 48 | 36 | 20 | 6 | 32 |
| Avg Max Temp (°F) | 20 | 26 | 39 | 55 | 69 | 77 | 82 | 80 | 70 | 57 | 37 | 24 | 53 |
| Avg Precip (In.) | .73 | .57 | 1.13 | 1.83 | 2.7 | 3.47 | 3.61 | 3.01 | 1.91 | 1.71 | .87 | .47 | 22 |