Beulah, North Dakota has a Humid Continental Mild Summer With Dry Winters climate (Köppen classification: Dwb). Average annual temperatures range from -1.4 °C (low) to 12.1 °C (high). Annual precipitation averages 444.8 Millimeters. Beulah 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 | -16.9 °C | -5.8 °C | 8.38 mm |
| February | -14.6 °C | -3 °C | 11.43 mm |
| March | -8.5 °C | 3.8 °C | 14.73 mm |
| April | -2 °C | 12.7 °C | 33.27 mm |
| May | 4.7 °C | 19.2 °C | 67.82 mm |
| June | 10.5 °C | 24.2 °C | 90.68 mm |
| July | 13.3 °C | 28.3 °C | 66.04 mm |
| August | 12 °C | 28.4 °C | 46.99 mm |
| September | 6.4 °C | 22.8 °C | 42.67 mm |
| October | -0.3 °C | 13.8 °C | 35.05 mm |
| November | -7.6 °C | 4.3 °C | 14.99 mm |
| December | -13.6 °C | -3.1 °C | 12.7 mm |
| Annual | -1.4 °C | 12.1 °C | 444.75 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dwb - Humid Continental Mild Summer With Dry Winters |