Karlsruhe, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -1.8 °C (low) to 10.5 °C (high). Annual precipitation averages 487.4 Millimeters. Karlsruhe 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 | -18.6 °C | -8 °C | 12.7 mm |
| February | -16.7 °C | -5.5 °C | 12.7 mm |
| March | -9.7 °C | 1.4 °C | 18.03 mm |
| April | -2.1 °C | 11.2 °C | 26.92 mm |
| May | 5.3 °C | 18.8 °C | 69.85 mm |
| June | 11.4 °C | 23.6 °C | 99.57 mm |
| July | 13.8 °C | 26.8 °C | 75.44 mm |
| August | 12.1 °C | 26.8 °C | 53.85 mm |
| September | 6.8 °C | 21.4 °C | 44.45 mm |
| October | -0.4 °C | 12.4 °C | 37.08 mm |
| November | -8.2 °C | 2.5 °C | 20.83 mm |
| December | -15.3 °C | -5.3 °C | 16 mm |
| Annual | -1.8 °C | 10.5 °C | 487.42 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 | Dfb - Humid Continental Mild Summer, Wet All Year |