Wishek, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 30.5 °F (low) to 51.8 °F (high). Annual precipitation averages 20.6 Inches. Wishek 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 | 1.3 °F | 19.5 °F | 0.49 in. |
| February | 5.6 °F | 24.2 °F | 0.64 in. |
| March | 16.8 °F | 36.4 °F | 0.88 in. |
| April | 29.2 °F | 52.5 °F | 1.39 in. |
| May | 41.9 °F | 65.0 °F | 2.95 in. |
| June | 52.8 °F | 74.3 °F | 3.82 in. |
| July | 57.7 °F | 80.6 °F | 3.27 in. |
| August | 55.3 °F | 79.6 °F | 2.37 in. |
| September | 46.0 °F | 70.9 °F | 2.0 in. |
| October | 32.9 °F | 54.9 °F | 1.7 in. |
| November | 18.9 °F | 38.4 °F | 0.55 in. |
| December | 8.0 °F | 24.9 °F | 0.51 in. |
| Annual | 30.5 °F | 51.8 °F | 20.57 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 | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |