Gladstone, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 30 °F (low) to 54.7 °F (high). Annual precipitation averages 16.9 Inches. Gladstone 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 | 4.3 °F | 24.9 °F | 0.33 in. |
| February | 7.6 °F | 29.3 °F | 0.41 in. |
| March | 17.8 °F | 40.9 °F | 0.65 in. |
| April | 28.5 °F | 54.6 °F | 1.2 in. |
| May | 40.3 °F | 66.2 °F | 2.61 in. |
| June | 50.4 °F | 75.2 °F | 3.2 in. |
| July | 55.5 °F | 83.2 °F | 2.48 in. |
| August | 53.5 °F | 83.3 °F | 1.84 in. |
| September | 43.8 °F | 73.0 °F | 1.83 in. |
| October | 31.1 °F | 56.7 °F | 1.39 in. |
| November | 18.5 °F | 40.6 °F | 0.56 in. |
| December | 8.5 °F | 28.8 °F | 0.4 in. |
| Annual | 30 °F | 54.7 °F | 16.9 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 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 |