| 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 21 - May 31 |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate |
| Ecoregion: | 43a - Missouri Plateau |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 58623 - Bowman, ND | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 4 | 10 | 19 | 30 | 41 | 50 | 55 | 53 | 42 | 31 | 18 | 8 | 30 |
| Avg Max Temp (°F) | 26 | 32 | 41 | 54 | 66 | 76 | 84 | 83 | 71 | 58 | 40 | 29 | 55 |
| Avg Precip (In.) | .46 | .46 | .71 | 1.37 | 2.55 | 3.09 | 2.07 | 1.28 | 1.32 | 1.32 | .58 | .41 | 15.63 |