Hettinger, North Dakota has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 30.8 °F (low) to 55.7 °F (high). Annual precipitation averages 16.4 Inches. Hettinger is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.6 °F | 27.5 °F | 0.34 in. |
| February | 9.9 °F | 31.2 °F | 0.46 in. |
| March | 18.9 °F | 42.1 °F | 0.73 in. |
| April | 28.9 °F | 54.5 °F | 1.35 in. |
| May | 40.3 °F | 65.3 °F | 2.7 in. |
| June | 50.5 °F | 75.2 °F | 3.07 in. |
| July | 56.1 °F | 83.9 °F | 2.38 in. |
| August | 53.6 °F | 83.5 °F | 1.71 in. |
| September | 43.8 °F | 73.8 °F | 1.38 in. |
| October | 31.4 °F | 57.6 °F | 1.42 in. |
| November | 19.3 °F | 42.7 °F | 0.53 in. |
| December | 9.7 °F | 30.7 °F | 0.37 in. |
| Annual | 30.8 °F | 55.7 °F | 16.44 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |