Hettinger, North Dakota has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -0.7 °C (low) to 13.1 °C (high). Annual precipitation averages 417.6 Millimeters. 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 | -14.1 °C | -2.5 °C | 8.64 mm |
| February | -12.3 °C | -0.4 °C | 11.68 mm |
| March | -7.3 °C | 5.6 °C | 18.54 mm |
| April | -1.7 °C | 12.5 °C | 34.29 mm |
| May | 4.6 °C | 18.5 °C | 68.58 mm |
| June | 10.3 °C | 24 °C | 77.98 mm |
| July | 13.4 °C | 28.8 °C | 60.45 mm |
| August | 12 °C | 28.6 °C | 43.43 mm |
| September | 6.6 °C | 23.2 °C | 35.05 mm |
| October | -0.3 °C | 14.2 °C | 36.07 mm |
| November | -7.1 °C | 5.9 °C | 13.46 mm |
| December | -12.4 °C | -0.7 °C | 9.4 mm |
| Annual | -0.7 °C | 13.1 °C | 417.57 mm |
| 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 : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |