Karlsruhe, North Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 28.8 °F (low) to 50.9 °F (high). Annual precipitation averages 19.2 Inches. 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 | -1.5 °F | 17.6 °F | 0.5 in. |
| February | 1.9 °F | 22.1 °F | 0.5 in. |
| March | 14.6 °F | 34.6 °F | 0.71 in. |
| April | 28.2 °F | 52.2 °F | 1.06 in. |
| May | 41.5 °F | 65.8 °F | 2.75 in. |
| June | 52.6 °F | 74.5 °F | 3.92 in. |
| July | 56.8 °F | 80.3 °F | 2.97 in. |
| August | 53.7 °F | 80.2 °F | 2.12 in. |
| September | 44.3 °F | 70.6 °F | 1.75 in. |
| October | 31.2 °F | 54.4 °F | 1.46 in. |
| November | 17.2 °F | 36.5 °F | 0.82 in. |
| December | 4.5 °F | 22.5 °F | 0.63 in. |
| Annual | 28.8 °F | 50.9 °F | 19.19 in. |
| 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 : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |