Hazen, North Dakota has a Humid Continental Mild Summer With Dry Winters climate (Köppen classification: Dwb). Average annual temperatures range from 29.2 °F (low) to 53.7 °F (high). Annual precipitation averages 17.6 Inches. Hazen is located in USDA Plant Hardiness Zone 4a. 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 | 1.6 °F | 21.7 °F | 0.37 in. |
| February | 5.7 °F | 26.6 °F | 0.43 in. |
| March | 16.4 °F | 38.9 °F | 0.6 in. |
| April | 28.0 °F | 54.4 °F | 1.25 in. |
| May | 39.9 °F | 66.1 °F | 2.75 in. |
| June | 50.6 °F | 75.1 °F | 3.35 in. |
| July | 55.5 °F | 82.6 °F | 2.77 in. |
| August | 52.9 °F | 82.5 °F | 1.91 in. |
| September | 42.9 °F | 73.0 °F | 1.71 in. |
| October | 31.4 °F | 56.9 °F | 1.35 in. |
| November | 18.3 °F | 40.0 °F | 0.59 in. |
| December | 7.7 °F | 26.6 °F | 0.5 in. |
| Annual | 29.2 °F | 53.7 °F | 17.58 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dwb - Humid Continental Mild Summer With Dry Winters |