Douglas, North Dakota has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -1.2 °C (low) to 10.6 °C (high). Annual precipitation averages 469.6 Millimeters. Douglas 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 | -17.5 °C | -7.4 °C | 12.19 mm |
| February | -15.6 °C | -4.9 °C | 11.94 mm |
| March | -8.9 °C | 1.9 °C | 18.03 mm |
| April | -1.8 °C | 10.9 °C | 26.16 mm |
| May | 5.2 °C | 18.1 °C | 73.15 mm |
| June | 11.2 °C | 23.1 °C | 97.03 mm |
| July | 13.8 °C | 26.7 °C | 69.85 mm |
| August | 12.4 °C | 26.9 °C | 53.34 mm |
| September | 7.1 °C | 21.2 °C | 44.45 mm |
| October | 0.2 °C | 12.1 °C | 32.51 mm |
| November | -7.3 °C | 2.7 °C | 16.76 mm |
| December | -13.7 °C | -4.7 °C | 14.22 mm |
| Annual | -1.2 °C | 10.6 °C | 469.63 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 | Normal |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |