Gardner, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 31.5 °F (low) to 51.7 °F (high). Annual precipitation averages 23.7 Inches. Gardner is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.0 °F | 16.6 °F | 0.65 in. |
| February | 3.1 °F | 21.9 °F | 0.63 in. |
| March | 16.7 °F | 34.8 °F | 0.99 in. |
| April | 31.6 °F | 53.0 °F | 1.27 in. |
| May | 44.4 °F | 67.7 °F | 3.02 in. |
| June | 55.8 °F | 76.9 °F | 4.14 in. |
| July | 59.4 °F | 81.1 °F | 3.63 in. |
| August | 56.5 °F | 80.1 °F | 2.71 in. |
| September | 47.6 °F | 71.7 °F | 2.87 in. |
| October | 35.3 °F | 55.9 °F | 2.18 in. |
| November | 20.7 °F | 37.7 °F | 0.81 in. |
| December | 7.3 °F | 23.1 °F | 0.8 in. |
| Annual | 31.5 °F | 51.7 °F | 23.7 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |