Gladstone, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -1.1 °C (low) to 12.6 °C (high). Annual precipitation averages 429.3 Millimeters. 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 | -15.4 °C | -3.9 °C | 8.38 mm |
| February | -13.6 °C | -1.5 °C | 10.41 mm |
| March | -7.9 °C | 4.9 °C | 16.51 mm |
| April | -1.9 °C | 12.6 °C | 30.48 mm |
| May | 4.6 °C | 19 °C | 66.29 mm |
| June | 10.2 °C | 24 °C | 81.28 mm |
| July | 13.1 °C | 28.4 °C | 62.99 mm |
| August | 11.9 °C | 28.5 °C | 46.74 mm |
| September | 6.6 °C | 22.8 °C | 46.48 mm |
| October | -0.5 °C | 13.7 °C | 35.31 mm |
| November | -7.5 °C | 4.8 °C | 14.22 mm |
| December | -13.1 °C | -1.8 °C | 10.16 mm |
| Annual | -1.1 °C | 12.6 °C | 429.25 mm |
| 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 : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |