| 2023 Hardiness Zone: | Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°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: | Sep. 21 - Sep. 30 | |
| Average Last Frost Date: | May 11 - May 20 | |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate | |
| Ecoregion: | 43a - Missouri Plateau | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 58639 - Hettinger, ND | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 3 | 10 | 19 | 30 | 41 | 51 | 55 | 53 | 42 | 31 | 17 | 7 | 30 |
| Avg Max Temp (°F) | 24 | 31 | 41 | 54 | 67 | 76 | 83 | 83 | 71 | 58 | 39 | 28 | 55 |
| Avg Precip (In.) | .31 | .33 | .62 | 1.63 | 2.59 | 3 | 2.17 | 1.49 | 1.39 | 1.36 | .54 | .33 | 15.76 |