Dunseith, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 27.1 °F (low) to 48.6 °F (high). Annual precipitation averages 19.2 Inches. Dunseith is located in USDA Plant Hardiness Zone 3b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.0 °F | 14.9 °F | 0.53 in. |
| February | -0.5 °F | 19.5 °F | 0.58 in. |
| March | 12.6 °F | 31.8 °F | 0.72 in. |
| April | 27.4 °F | 50.3 °F | 0.93 in. |
| May | 39.8 °F | 64.4 °F | 2.49 in. |
| June | 50.9 °F | 72.9 °F | 3.8 in. |
| July | 55.1 °F | 77.8 °F | 3.19 in. |
| August | 52.6 °F | 78.0 °F | 2.55 in. |
| September | 42.8 °F | 68.2 °F | 1.6 in. |
| October | 30.1 °F | 52.1 °F | 1.41 in. |
| November | 15.4 °F | 33.6 °F | 0.73 in. |
| December | 2.6 °F | 20.0 °F | 0.63 in. |
| Annual | 27.1 °F | 48.6 °F | 19.16 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 3b : -35°F to -30°F |
| Plant Hardiness Zone - 2012 | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |