Gwinner, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 31.9 °F (low) to 52.7 °F (high). Annual precipitation averages 23.5 Inches. Gwinner is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.5 °F | 19.5 °F | 0.59 in. |
| February | 5.3 °F | 24.4 °F | 0.6 in. |
| March | 17.9 °F | 36.9 °F | 0.98 in. |
| April | 31.1 °F | 53.1 °F | 1.76 in. |
| May | 44.5 °F | 67.1 °F | 3.14 in. |
| June | 55.7 °F | 76.6 °F | 4.23 in. |
| July | 59.5 °F | 81.2 °F | 3.55 in. |
| August | 56.8 °F | 80.2 °F | 2.39 in. |
| September | 47.2 °F | 72.3 °F | 2.62 in. |
| October | 33.9 °F | 56.5 °F | 2.22 in. |
| November | 20.3 °F | 38.9 °F | 0.74 in. |
| December | 8.8 °F | 25.5 °F | 0.69 in. |
| Annual | 31.9 °F | 52.7 °F | 23.51 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 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 | Dfb - Humid Continental Mild Summer, Wet All Year |